The Intergenerational Housing Divide
A Global Data Portrait
The widest recorded gap between young and old in housing satisfaction signals a structural, not cyclical, crisis.
In December 2024, the International Monetary Fund published a data portrait that crystallised what housing researchers had long suspected: the crisis was no longer evenly distributed across society. According to IMF Finance & Development data published that month, 60% of OECD survey respondents aged 18–39 reported being worried about housing affordability, compared to only 38% of those aged 55–64 — a 22-percentage-point intergenerational gap that was widest in Ireland, Canada, and the United States. ✓ Established [1]
These numbers do not exist in isolation. A 2024 Gallup survey of OECD residents found that only 43% were satisfied with the availability of good, affordable housing — making housing the only one of five measured public services that failed to achieve a median satisfaction rating above 50% in 2024. Peak dissatisfaction had reached 52% in 2022. ✓ Established [3] Strikingly, OECD residents were less satisfied with affordable housing than residents in the rest of the world — reversing the usual hierarchy of public-service delivery between wealthy and developing nations.
The macroeconomic backdrop explains much of the sentiment. According to Santander's January 2025 global housing markets report, drawing on Bank for International Settlements data, real global house prices are approximately 20% above their post-Global Financial Crisis levels, and advanced economies still posted a 1% increase in house prices in 2024 despite years of monetary tightening. ✓ Established [2] The same report notes that the BIS identifies declining housing supply elasticity over the past fifty years as the central structural driver of these price increases — a finding with profound policy implications that will be revisited throughout this report.
The human costs extend well beyond frustrated aspiration. The OECD's Society at a Glance 2024 report found that in eight OECD countries, more than 40% of low-income mortgage holders spent over 40% of their disposable income on housing in 2022. ✓ Established [4] Over two million people are officially counted as homeless across OECD nations — a figure that excludes the far larger population living in inadequate, overcrowded, or insecure housing. And according to Santander's 2025 analysis, housing has become the second most cited barrier to childbearing in most OECD countries — linking the housing crisis directly to the demographic emergency of falling birth rates that now preoccupies governments from Seoul to Rome. ◈ Strong Evidence [2]
What is distinctive about the present crisis is its simultaneity. Housing has become unaffordable in megacities and mid-sized towns, in English-speaking settler economies and in continental Europe, under both liberal-market and coordinated-market economic models. The generation born after 1985 faces, across most OECD countries, a housing market structurally hostile to first-time buyers in a way their parents did not. Understanding why requires tracing two interlocking histories: the political capture of planning systems by incumbent homeowners, and the transformation of residential property into a global asset class.
The NIMBY Machine
How Homeowners Captured Planning Systems Worldwide
Zoning began as a public-health tool; it became the most powerful wealth-protection mechanism in democratic politics.
The origins of modern zoning are legitimate enough. In the early twentieth century, reformers in New York, Frankfurt, and London sought to separate noxious industrial uses from residential neighbourhoods, and to prevent landlords from packing workers into sunless tenements. These were genuine public goods. But somewhere in the postwar decades — accelerated in the United States, United Kingdom, and Australia by the mass extension of homeownership and the consequent political weight of homeowner blocs — zoning mutated from a public-health instrument into a mechanism for restricting housing supply, preserving neighbourhood character (a phrase that has carried racial and class-exclusionary freight from its inception), and protecting the asset values of those who already owned property.
The political economy of this transformation is not subtle. Homeowners benefit directly from rising house prices: their net worth increases while they sleep. Renters and prospective first-time buyers bear the cost. But homeowners vote at higher rates, donate more to local political campaigns, and attend planning meetings in numbers that renters — who are more mobile and more time-constrained — cannot match. The result is a systematic bias in democratic planning systems toward incumbents and against newcomers.
The consequences in the United States have been particularly well-documented. According to a 2025 analysis by the Independent Institute, NIMBY activism — Not In My Back Yard opposition to new residential development — has operated in California since at least the 1970s through anti-growth politicians, restrictive ballot initiatives, and protracted litigation. The analysis cites the case of Berkeley, California, where a single housing project was blocked for eight years before the city was ordered to pay $4 million in restitution after losing in court. ✓ Established [6] The same analysis notes that NIMBYism adds unpredictable regulatory costs that deter both builders and lenders — a deterrent effect dramatically illustrated when Wood Partners, one of the United States' largest multifamily developers, announced in July 2024 that it was ceasing all new projects in California entirely. ✓ Established [6]
The phenomenon is not American alone. In the United Kingdom, the planning system established by the Town and Country Planning Act 1947 vests discretionary decision-making power in local councils — whose elected members are disproportionately drawn from the homeowning class. In Australia, state-level planning appeals and local council vetoes have produced some of the world's most expensive housing markets in Sydney and Melbourne despite abundant land. In Ireland — which recorded the IMF's widest intergenerational housing gap — a combination of one-off rural housing permissions, Green Belt restrictions around Dublin, and objection rights for third parties has produced chronic undersupply in the capital while the country's population grows.
What makes the NIMBY machine so durable is that it is largely invisible as a redistributive mechanism. Zoning restrictions are framed as environmental protection, heritage preservation, traffic management, or neighbourhood character. The language of exclusion is the language of care. Only when viewed in aggregate — as a system that prevents the construction of homes in the places where people want to live — does its redistributive character become apparent: a transfer of wealth from the young, the mobile, and the less wealthy to the old, the settled, and the already-propertied.
The Bank for International Settlements, cited in Santander's 2025 housing report, identifies declining housing supply elasticity over fifty years as the central driver of price increases globally. ◈ Strong Evidence [2] Supply elasticity — the degree to which the housing stock can expand in response to rising prices and population — is itself a function of planning rules. Where those rules are permissive, prices are stable. Where they are restrictive, prices ratchet upward with each demand shock. The three cities examined in the second half of this report — Vienna, Singapore, and Tokyo — each represent a different structural solution to the supply elasticity problem. All three work. All three are politically difficult to replicate.
Financialisation vs. Supply
The Contested Frontier of Housing Economics
Whether homes-as-investment-assets or homes-as-scarce-commodity is the primary cause of unaffordability is not merely academic — it determines which policies get prescribed.
No debate in housing economics is more consequential — or more genuinely unresolved — than the contest between two structural explanations for the crisis. The first, associated with urban economists in the tradition of Edward Glaeser at Harvard, holds that the housing crisis is fundamentally a supply crisis: governments have made it artificially difficult to build homes in the places where people want to live, and the consequent scarcity drives prices upward in a way that no amount of financial regulation can overcome. The second, associated with critical urban studies and heterodox economics, holds that the financialisation of housing — its treatment as an investment asset and store of wealth rather than a place to live — has fundamentally distorted both prices and the policy response, concentrating ownership, suppressing rental quality, and pricing out the bottom half of the income distribution regardless of supply.
Both positions have serious scholarly backing and serious empirical problems.
The Supply Argument
The Financialisation Argument
The debate matters because the two diagnoses lead to profoundly different prescriptions. If supply is the primary constraint, the correct response is liberalising zoning, streamlining planning approval, and building more homes of all tenures and price points — with the expectation that increased supply will soften prices across the market. If financialisation is the primary driver, supply-side measures may simply deliver more product for institutional investors to absorb, with limited benefit to first-time buyers or renters, while the correct response involves taxing speculative land ownership, restricting short-term lettings platforms, regulating institutional buy-to-let, and restoring non-market housing as a large-scale tenure option.
The empirical evidence, examined honestly, suggests that both forces are real and that their relative weight varies by context. Tokyo's experience — examined in detail in Section 06 — provides the strongest evidence for the supply thesis: a mega-city of nearly 40 million people that maintained affordability through permissive zoning for decades, regardless of monetary conditions. But Tokyo's own recent experience, in which a weak yen and capital flight from China's real estate crisis triggered a new affordability surge in 2024–25, suggests that sufficiently large financial flows can overwhelm even a well-designed supply system. ◈ Strong Evidence [10]
Vienna's model, conversely, demonstrates that removing housing from the market entirely — through public ownership at scale — can suppress rents irrespective of supply elasticity, but at a fiscal cost that requires a specific political settlement (a 1% wage tax on all Austrian workers, according to the American Enterprise Institute's 2024 analysis) [9] and can create its own distortions in the form of shadow markets and maintenance deficits, as critics from the right document.
The contested question of whether supply or financialisation is the root cause is itself the story. Policymakers who accept only one diagnosis will prescribe incomplete remedies — and the populations who pay the price for incomplete remedies are, overwhelmingly, the young, the renting, and the poor.
The housing crisis is not a market failure waiting to be corrected by a single policy lever. It is a political economy failure, maintained by the interests of those who benefit from scarcity — and its solutions require politically costly redistribution of both land and power.
— Synthesis of Housing Studies special issue, University of Turku, 2024The Vienna Model
A Century of Public Housing — and Its Real Costs
Vienna has kept rents lower than any other major Western European city through a hundred-year commitment to non-market housing — but its critics are not entirely wrong.
The story of Vienna's housing model begins in the 1920s, in a city governed by the Social Democratic Party of Austria — a period known as Rotes Wien, or Red Vienna. Between 1919 and 1934, the city government built approximately 65,000 apartments in 382 complexes, financed by a progressive municipal tax on luxury goods and large apartments. The most famous of these complexes, Karl-Marx-Hof in the Döbling district, stretches over one kilometre, contains approximately 1,300 apartments, and has housed Viennese residents continuously since its completion in 1930. It still does.
What distinguishes Vienna from almost every other Western city that built social housing in the mid-twentieth century is what it did not do: it did not sell. When Margaret Thatcher's Right to Buy policy transferred 1.5 million units of British council housing into private ownership between 1980 and 1994, Vienna held firm. When the wave of social housing privatisation swept through Sweden, Ireland, and the Netherlands in the 1990s and 2000s, Vienna held firm. The result is that today, according to the city's official social housing portal, approximately 50% of Vienna's 1.9 million residents live in subsidised dwellings — either in 220,000 municipal Gemeindebau units or in 200,000 cooperative flats built with municipal subsidies. ✓ Established [5]
The market consequences of this scale are substantial and well-documented. According to a June 2025 report by the Climate and Community Institute, the average rent per square metre in Vienna in 2023 was €10.50 — more than three times lower than Inner London rents, and the lowest of any major Western European city. ✓ Established [11] Critically, this price-dampening effect is not confined to the social housing sector: the sheer volume of below-market units suppresses rents across the entire private market, benefiting even those who never apply for or obtain a social tenancy. ◈ Strong Evidence [5]
Vienna's current housing programme, the Wohnbauoffensive 2024+ (Housing Offensive 2024+), commits to building 22,200 new subsidised apartments for more than 45,000 people, with a total budget of €2.8 billion including €1.1 billion in direct public subsidies. Under the programme, two-thirds of all newly zoned land must be allocated to social housing, and the city currently holds approximately three million square metres of land for future development. ◈ Strong Evidence [12] Notably, Vienna operates with no zoning category for single-family housing — a structural absence that prevents the kind of low-density suburban sprawl that in other cities generates both high land consumption and high travel costs for lower-income residents. ◈ Strong Evidence [12]
But Vienna's critics — including a 2024 analysis by the American Enterprise Institute — raise concerns that deserve serious engagement rather than dismissal. The AEI analysis notes that Austria spends approximately 0.25% of GDP on social housing (the third-highest proportion in the OECD), financed partly by a 1% wage tax levied on all Austrian workers regardless of income, which is a regressive mechanism that transfers resources from lower-paid workers to the administrative infrastructure of the housing system. ⚖ Contested [9]
More substantively, the AEI analysis cites research estimating that the city's public housing stock faced a maintenance shortfall in 2016 equal to 1.6 times its annual rental income — a capital deficit that reportedly forced maintenance delays and that, according to the same source, has left approximately one-third of municipal units lacking central heating or private bathrooms. A shadow market of Ablöse payments — informal cash transfers of thousands of euros demanded from incoming tenants as the price of inheriting a social tenancy — is also documented, undermining the claim that the system is both equitable and transparent. ⚖ Contested [9]
The honest assessment of Vienna is therefore neither uncritical celebration nor ideological dismissal. It is the most successful large-scale social housing system in the Western world by the metrics that matter most — rents paid by ordinary people — and it achieves this through a century of political commitment that has survived both fascism (which temporarily seized the housing stock in the 1930s) and the privatisation wave of the neoliberal era. Its maintenance gaps and shadow markets are real defects, but they are defects of a system that is functioning; they do not negate the fundamental achievement. The question for other cities is not whether Vienna's specific institutional form is replicable, but which of its structural features — above all, permanent public ownership and a mandate to build continuously — can be adapted to different political contexts.
Singapore's HDB Miracle
Public Ownership, Compulsory Savings, and Mass Homeownership
Singapore solved a housing crisis within a single decade by combining state authority, compulsory savings, and a non-ideological commitment to delivery — producing the world's highest rate of public-housing-based homeownership.
When the Housing and Development Board was established in Singapore in 1960, the city-state was a slum-ridden colonial entrepôt with a severe shortage of decent housing. Within three years of its founding, the HDB had built 21,000 flats. Within ten years, according to the HDB's own official account, the housing crisis had been resolved. ✓ Established [13] Today, more than one million HDB flats are distributed across 24 towns and three estates, housing approximately 80% of Singapore's resident population, of whom 9 in 10 own rather than rent their flat. ✓ Established [13]
Singapore's model is philosophically the inverse of Vienna's: where Vienna prioritises renting at below-market cost as the core social good, Singapore prioritises homeownership. The mechanism that made mass public homeownership possible without large up-front cash payments is the Central Provident Fund (CPF), a mandatory savings scheme into which both employers and employees contribute, with the combined rate reaching up to 34.5% of salary. CPF savings can be used directly to service HDB mortgage payments, meaning that residents could purchase their flats using money they had already set aside — dramatically expanding access to ownership for households without savings. ◈ Strong Evidence [14]
In 2017, the HDB received S$1.19 billion in public subsidies — a figure that the World Bank's March 2024 blog analysis on Singapore's programme contextualises as modest relative to the programme's scale and outcomes. The same analysis highlights the deliberate integration of HDB estates: mixed-income design, high-quality public transport access, and equitable school placement. Singapore's racial integration quotas for HDB estates — a distinctive and politically controversial feature — have also been credited with preventing the ethnic sorting that has plagued social housing in France, Sweden, and the United Kingdom. ◈ Strong Evidence [14]
The political preconditions for Singapore's model are, however, stark. The HDB operated under a government with compulsory land acquisition powers — the Land Acquisition Act of 1966 allowed the state to acquire land at below-market rates, dramatically lowering the cost of the programme and preventing the land banking that distorts housing markets in other jurisdictions. Singapore is also a city-state with no municipal-central government tension, enabling the kind of unified, long-term policy implementation that is structurally impossible in federated systems or in cities where planning authority is devolved to a patchwork of local councils.
Critics of the Singapore model as a global template point to these preconditions as disqualifying. The city-state's population of approximately 5.9 million, its single governing party (the People's Action Party has governed without interruption since 1959), and its absence of meaningful land-use opposition make it an outlier in democratic theory as much as in housing policy. But as the World Bank's analysis notes, the programme's core insights — that public subsidy at scale can produce mass homeownership, that compulsory savings can substitute for mortgage markets accessible only to the wealthy, and that integration rather than segregation produces better social outcomes — are transferable even where the institutional form is not.
Singapore also faces its own emerging pressures. Resale HDB flat prices have risen significantly in recent years as the city-state's population and income levels have grown, raising questions about whether the model can maintain affordability for new entrants to the housing market. The distinction between the primary (new BTO flat) market, where prices remain heavily subsidised, and the secondary (resale) market, where prices can be substantial, creates a two-tier system whose equity implications are increasingly debated within Singapore itself.
Tokyo's Supply Solution
National Zoning, No NIMBYs, and the World's Most Liveable Megacity
Tokyo achieved affordability not through public ownership but by making it legally almost impossible for local groups to prevent housing construction — and then letting the market build.
Tokyo is the world's largest metropolitan area by population, with approximately 40 million people living in the Greater Tokyo Area. It is also, by the standards of global megacities, remarkably affordable. According to a 2024 academic analysis published in the International Journal of Innovative Science and Research Technology (IJISRT), a downtown Tokyo one-bedroom apartment rents for approximately 80,000 yen per month — roughly US$500 at 2024 exchange rates — compared to approximately US$4,000 for an equivalent unit in Manhattan. ✓ Established [15]
This affordability is not the product of a declining or stagnant city. Tokyo has continued to attract migrants from across Japan and internationally, its economy remains one of the world's most productive, and its public services — transport, healthcare, education — are among the best of any major city. The affordability is the product of deliberate policy choices, operating through three mutually reinforcing mechanisms identified in the IJISRT analysis: the short physical and fiscal lifespan of Japanese dwellings (encouraging rapid rebuilding and continuous supply addition); extremely permissive mixed-use zoning that allows housing in commercial and light-industrial areas; and centrally overridden development approval that effectively neutered local NIMBY movements. ◈ Strong Evidence [15]
The central legal mechanism is Japan's national zoning system, established in 1968 and consisting of twelve land-use zones defined by the central government. Housing is permitted in ten of the twelve zones, including commercial and light-industrial areas. According to a January 2024 analysis in Inroads Journal, this system made it structurally almost impossible for local groups to block new residential construction, eliminating the institutional preconditions for the kind of NIMBY movements that dominate planning politics in the United States, United Kingdom, and Australia. ◈ Strong Evidence [10]
Prime Minister Junichiro Koizumi's 2002 Urban Renaissance Policy accelerated this further by speeding up rezoning procedures and building permit approval, reinforcing the supply-permissive character of the national system. The result, documented in the Inroads Journal analysis, was a period of stable prices, the lowest homelessness rate of any large country, and high housing satisfaction through the first two decades of the twenty-first century — a record of sustained affordability unprecedented in any large democratic city. ◈ Strong Evidence [10]
The IJISRT 2024 academic analysis documents this gap as the outcome of Japan's post-1968 national zoning system: 12 centrally-set land-use zones permit housing in 10 of 12 categories, including commercial and mixed-use areas. The short fiscal lifespan of Japanese dwellings — buildings typically depreciate to near-zero value within 20–30 years, encouraging rapid rebuilding — creates a continuous pipeline of new supply that keeps pace with household formation. The outcome is a flexible, high-turnover stock that expands faster than household growth. [15]
One statistical curiosity of Tokyo's housing abundance is the sheer number of empty homes it has produced. Japanese government data, cited in the IJISRT analysis, recorded 8.49 million vacant housing units across Japan in 2018 — nearly double the figure from 1998 — with projections suggesting the number could reach 23.03 million by 2038. ◈ Strong Evidence [15] This is the inverse of the scarcity problem that afflicts London, Sydney, and San Francisco: Japan has, in some respects, overbuilt relative to its demographic trajectory, producing a stock of akiya (abandoned homes) that are themselves becoming a planning and social challenge in rural and post-industrial areas, even as urban areas remain well-supplied.
But Tokyo's model is now facing a new stress test. According to the Inroads Journal's 2024 analysis, recent yen weakness and capital flight from China's real estate crisis have triggered a significant surge in Tokyo property prices in 2024–25 — driven not by domestic demand but by international investors seeking stable assets in a depreciated currency. ◈ Strong Evidence [10] This challenges the premise that supply-side permissiveness is sufficient to maintain affordability against sufficiently large financial flows — and illustrates a limitation of the pure supply model that proponents of financialisation-focused analysis have always highlighted.
Africa and Latin America
The Other Housing Crisis: Informality, Not Just Unaffordability
In the Global South, the housing crisis takes a different form — not prices beyond reach but homes that are structurally inadequate, insecure, or absent entirely.
The housing crisis in the Global South is structurally distinct from — though causally connected to — the affordability crisis in OECD cities. In wealthy democracies, the problem is primarily one of price: homes exist, but young and lower-income people cannot afford to rent or buy them in the cities where economic opportunity concentrates. In sub-Saharan Africa, Latin America, and South and Southeast Asia, the problem is more fundamental: homes in the required quantity and quality do not exist at all, and the housing that does exist is frequently built outside formal regulatory frameworks, without secure tenure, and in locations vulnerable to flooding, disease, and forced eviction.
According to a 2025 analysis by the Center for Strategic and International Studies (CSIS), nearly 240 million people in Africa live in informal settlements, constituting almost half of Africa's entire urban population. ✓ Established [16] Sub-Saharan African households spend on average 43.5% of their income on shelter — well above the global average of 31% — leaving severely diminished resources for food, education, and healthcare. ✓ Established [16] Africa's real estate market was valued at $223.43 billion in 2024 and is projected to reach $332.32 billion by 2033 — but this growth reflects the activities of the formal market serving higher-income households, not the construction of affordable housing at scale for the majority of urban residents.
The Latin American picture is similarly acute. A 2024–25 analysis drawing on Inter-American Development Bank data and published in Rio Times Online documents an average qualitative housing deficit across eleven Latin American and Caribbean countries of 23.8% — meaning nearly a quarter of homes are structurally inadequate, overcrowded, or lacking basic services. The quantitative deficit — an outright shortage of dwelling units — averages 9.6% of the housing stock. ✓ Established [17]
The market failure in Latin American housing is particularly stark in its distributional dimension. In Costa Rica, 90% of new housing construction is built for only the top 30% of income earners — leaving the remaining 70% of the population to navigate an informal market, wait for inadequate social housing programmes, or build their own dwellings on unserviced land. ✓ Established [17] In Brazil, the IDB data cited in the same analysis shows that informal settlements — favelas — rose by 11% even during a period in which the national economy grew by 10%, confirming that economic growth alone does not translate into housing access for lower-income urban residents. Across the region, two of every three million new urban households formed annually settle in informal housing. ◈ Strong Evidence [17]
The Global South housing crisis shares one structural feature with the OECD crisis: it is primarily a political economy failure rather than a resource failure. Africa's real estate market is growing rapidly; Latin American construction industries are active and large. The problem is not an absence of building capacity but an absence of mechanisms — financial, institutional, and regulatory — that direct that capacity toward housing the majority rather than the minority. Mortgage markets remain underdeveloped or inaccessible for lower-income households across both regions. Social housing programmes, where they exist, are typically underfunded, poorly located (built far from employment centres to minimise land costs), and burdened with corruption and patronage. Land tenure insecurity deters private investment in informal settlements while simultaneously exposing residents to eviction. And rapid urbanisation — driven by climate change, agricultural failure, and rural-urban income differentials — is adding urban population faster than any public or private sector housing programme has thus far been able to match.
For the Global South, the lessons of Vienna, Singapore, and Tokyo are applicable but require translation. Singapore's CPF mechanism — compelling savings that can be directed toward housing — is perhaps the most transferable model to middle-income developing countries with functioning payroll infrastructure. Centralising zoning authority at the national level, as Japan did, would require dismantling deeply entrenched local political economies. Vienna's model of permanent public ownership requires a level of fiscal capacity and institutional continuity that most sub-Saharan African governments do not currently possess. The absence of easy answers does not make these examples irrelevant — it makes honest analysis of their preconditions more important.
What Can Actually Be Transplanted?
Political Barriers, Structural Prerequisites, and a Menu of Interventions
Three models that work — none of which is politically replicable in its original form — and what honest synthesis suggests for policymakers in different contexts.
The three case studies examined in this report — Vienna, Singapore, and Tokyo — demonstrate conclusively that mass housing affordability at scale is achievable through radically different means. What they share is not a specific policy instrument but a set of structural conditions: the political will to override short-term incumbent interests; institutional mechanisms that prevent supply restriction by existing landowners and homeowners; a long-term fiscal commitment that survives electoral cycles; and a conceptual framework that treats housing as a social good rather than exclusively as a financial asset. What they lack is easy replicability in the democratic, decentralised, financialised political economies that characterise most of the OECD and much of the upper-middle-income world.
The OECD's own data on social housing illustrates how far most wealthy countries are from any of these models. According to the OECD's Society at a Glance 2024, social housing plays a major role — defined as comprising more than 15% of total housing stock — in only four OECD countries: the Netherlands, Austria, Denmark, and the United Kingdom. ✓ Established [4] In the United States, Canada, Australia, and most of Southern and Eastern Europe, social housing is either a residual system serving only the most marginalised or has been substantially privatised. These are the countries where the intergenerational housing gap is widest and dissatisfaction is highest.
| Barrier to Replication | Severity | Assessment |
|---|---|---|
| Homeowner political power (NIMBY capture of planning) | The single greatest obstacle in liberal democracies with high homeownership rates. Self-reinforcing through asset price appreciation. | |
| Financialisation incentives for incumbents | Governments dependent on housing wealth effects for consumer spending have structural incentives against supply expansion. | |
| Fiscal capacity for public housing (Global South) | Vienna's model requires ~0.25% of GDP committed indefinitely; most low-income countries lack this fiscal headroom. | |
| Centralised zoning authority (Tokyo model) | Requires stripping planning power from local councils — politically viable only with strong national mandates and compensation mechanisms. | |
| Compulsory savings infrastructure (Singapore model) | Requires formal employment base and payroll administration; feasible in middle-income countries, less so where informality dominates. |
What does honest policy synthesis suggest? The evidence from this report supports a differentiated menu of interventions calibrated to political and fiscal context, rather than ideological adherence to any single model.
For high-income OECD countries where homeowner political power is entrenched, the most tractable near-term interventions are those that work within existing democratic structures while gradually shifting the incentive landscape. National zoning mandates — overriding local NIMBY veto points as Japan did in 1968 and as New Zealand's National Policy Statement on Urban Development has begun to attempt — reduce the structural capacity for supply obstruction without requiring direct confrontation with homeowners on asset values. Land value capture mechanisms, which direct planning gains to public coffers rather than landowners, can fund social housing programmes without requiring general taxation at the Austrian scale. And ending the favourable tax treatment of investment property — including capital gains preferences, negative gearing, and principal residence exemptions for high-value properties — reduces the financialisation incentive at the margin.
For middle-income countries with growing urban populations, Singapore's CPF model offers the most actionable template: compulsory savings directed toward housing, combined with state land acquisition powers that prevent land banking, can produce mass affordable homeownership at relatively low ongoing fiscal cost once the system reaches scale. The political precondition — a government willing to acquire land and direct savings — is demanding but not impossible; several Latin American countries, including Uruguay (whose cooperative housing model has functioned since 1968), have demonstrated variants of this approach.
For low-income countries facing the most acute informality crisis, the immediate priority is tenure security — converting informal settlements from zones of eviction risk into stable communities where residents can invest in their homes — combined with targeted infrastructure provision. Full replication of Vienna or Singapore in Nairobi or Lagos is a generational project. But the political choice not to secure informal tenures and not to build social housing at scale is itself a policy — one whose costs are borne by the 240 million Africans currently living in informal settlements and the hundreds of millions more who will join them as urbanisation accelerates.
The intergenerational gap documented by the IMF in December 2024 — 60% of OECD adults aged 18–39 worried about housing affordability, versus 38% of those aged 55–64 — is not merely a data point. It is a forecast. As the cohort of housing-locked young adults grows in size, political salience, and electoral weight, the political economy of housing will shift. The question is whether it will shift fast enough, and toward solutions sufficiently radical, to prevent another generation from being permanently priced out of the cities that define the economic geography of the twenty-first century.