Can Gen Z Actually Afford to Pay for Boomer Pensions?

The short answer is: probably not without serious pain. When baby boomers entered the workforce, roughly five workers supported every single pensioner. Today, that number has fallen to around three workers per retiree across most rich countries. But here's where it gets truly alarming — OECD projections show that within 30 years, there will be fewer than two workers per pensioner. So when people ask whether Gen Z and millennials can afford to pay for boomer pensions, the math is already starting to break down. France is the clearest proof of that: President Macron was forced to raise the retirement age from 62 to 64, triggering nationwide protests. And France is actually one of the younger rich-world countries. The harder-hit nations are in far worse shape.

This isn't just a European problem. It is a defining economic challenge of the next four decades — and it will reshape everything from your tax bill to the value of your investments. Let's break down exactly what's happening, why existing solutions fall short, and what — if anything — could actually work.

Why Is the Current Pension System Unsustainable?

Most pension systems in the developed world were designed in an era of population growth. More workers were always entering the system than leaving it, which made pay-as-you-go financing — where today's workers fund today's retirees — perfectly logical. But demographics have shifted dramatically. People are living longer, birth rates have fallen, and the enormous baby boomer generation is now crossing into retirement all at once.

The result? A structural mismatch. Fewer contributors are being asked to support more recipients, and those recipients are living longer and costing more in healthcare. Economists like Professor Charles Goodhart from the London School of Economics have warned that the next 40 years will not be anywhere near as prosperous as the last 40 — unless something dramatic changes.

Governments have tried four main responses, and none of them are popular:

  • Raise the retirement age. Germany, the UK, and the Netherlands are targeting 67. Italy has gone further, tying retirement age to life expectancy, potentially pushing it to 70. Unsurprisingly, workers in physically demanding jobs are furious.
  • Cut pension payments. Greece was forced into this during its debt crisis. Germany attempted to lower average pensions from 48% to 45% of average wages by 2040 — but even a three-point drop triggered enough backlash that politicians reversed course to 46%.
  • Raise worker contributions. Canada increased contribution rates from 5% to 6% between 2018 and 2023. Mexico and South Korea have announced similar increases. Still deeply unpopular.
  • Borrow more. Japan is the world's most rapidly aging country and has largely avoided hard pension choices by piling on government debt. But the UK and France have both recently flirted with debt crises — and not coincidentally, both have some of the most generous pension systems in the world.

The brutal truth is that in a pay-as-you-go system, when demographics shift this dramatically, someone has to absorb the loss. There are no painless options.

Pay As You Go vs. Funded Pensions: What's the Difference?

Understanding why some countries seem to be managing better requires understanding the two basic models of pension finance.

In a pay-as-you-go system, current workers pay taxes or contributions that go directly to current retirees. Countries like Germany, France, Italy, and Spain rely heavily on this model. It works beautifully when there are many workers per retiree — and breaks down when that ratio collapses.

In a funded system, workers save for their own retirement. Those savings are pooled into pension funds that invest in stocks, bonds, and other financial assets. When workers retire, they draw from what they saved plus investment returns — not from the contributions of the next generation. Denmark, the Netherlands, and Iceland all use heavily funded systems and are consistently ranked among the most sustainable pension systems in the world.

On the surface, funded systems look like the obvious solution. You're not depending on demographic luck. Each generation finances itself. But as we'll see, this model carries its own hidden risk that could be just as dangerous.

How Do Denmark and the Netherlands Pension Systems Work?

Danish and Dutch workers contribute to collective or private pension funds throughout their careers. Those funds invest aggressively in global financial markets — stocks, bonds, real estate, and more. The Netherlands has been so conservative in its return assumptions that a 2% average annual return would be enough to cover most pension obligations for the foreseeable future. That's a remarkably low bar, which is why these systems consistently top global sustainability rankings.

But here's the critical insight that most comparisons miss: Dutch and Danish pension funds have invested the majority of their savings abroad — particularly in the United States, which has a significantly younger demographic profile than Europe. This is not accidental. By exporting capital to younger, faster-growing economies, these small countries may be partially insulating themselves from the demographic trap that will squeeze their domestic economies.

Is this a genuine solution, or a clever trick that delays the problem? That depends heavily on what happens to global financial markets over the next few decades.

What Is the Asset Meltdown Hypothesis and Should You Worry?

This is where things get genuinely unsettling. As macroeconomists are careful to point out, financial markets and the real economy are not the same thing. Stock prices are ultimately claims on future goods and services. If an aging population means fewer workers producing less output, then eventually company earnings and asset prices should reflect that reality.

The asset meltdown hypothesis, first articulated by economists Sylvester Schieber and John Shoven back in 1994, makes a disturbing prediction: when the baby boomers start retiring en masse, pension funds will need to sell assets to pay out benefits. But the younger, smaller generation buying those assets is — by definition — smaller. Less demand, more supply. Prices fall.

Their original model, based purely on US demographics, predicted that private pension funds would begin emptying out around 2024. That is not a typo. We are living in that window right now.

This matters even for countries that don't primarily use funded systems, because boomers and Gen Xers worldwide have used private investment accounts — 401(k)s, ISAs, personal portfolios — to supplement their state pensions. The mass retirement drawdown of these assets could suppress financial market returns for a prolonged period.

Professor Goodhart and his co-author Manoj Pradhan predict the "Great Demographic Reversal" will bring: lower asset prices, higher inflation, higher taxes, and — the one silver lining — lower inequality, as labor shortages finally give low-paid workers bargaining power. Even that positive comes with a catch: those workers will still face higher inflation eroding their gains.

What Actually Happens to Pensions When All Boomers Retire?

There is one moderating factor worth noting. Research shows that many retirees don't fully draw down their pension savings. They die with significant assets remaining, which then pass to the next generation through inheritance. This intergenerational wealth transfer could soften the asset meltdown somewhat — but it won't eliminate the underlying demographic pressure.

The most telling real-world test case may have come from an unexpected place: Chile during COVID-19. To relieve financial stress during the pandemic, the Chilean government allowed citizens to access their pension savings early. The results were almost textbook:

  • The local stock market crashed.
  • A massive inflation spike followed.
  • The government ultimately stepped in to nationalize the pension system, converting it from largely funded to effectively pay-as-you-go.

Two of Goodhart's core predictions — asset price declines and inflation — materialized almost immediately when pension funds were drawn down at scale. It's a small-scale preview of what a larger demographic retirement wave could produce globally.

Could AI Actually Save Us From the Pension Crisis?

It's the wildcard that economists are reluctant to dismiss entirely. If artificial intelligence delivers productivity gains large enough to compensate for a shrinking workforce — if each remaining worker effectively becomes dramatically more productive — then the demographic math could improve significantly. More output per worker means more tax revenue, more goods and services, and less pressure on pension systems to cut benefits or raise ages.

The honest assessment is that the AI developments we're currently seeing are genuinely impressive, but it remains far from clear whether they will arrive at the scale and speed needed to offset a demographic shift 30 years in the making. Betting an entire pension system on that outcome is a significant gamble.

What seems far more certain is that the rich world is heading into decades of difficult tradeoffs. Whether your country uses a pay-as-you-go system or a fully funded one, the fundamental challenge is the same: fewer workers, more retirees, and a finite pool of real economic output to divide between them. No financial engineering fully escapes that constraint. The question is only who pays the price — and when.