Debt Didn't Cause the Housing Crisis — But It Can't Solve It Either

If you my last piece on the rate debate, you know my view: waiting for lower mortgage rates is not an affordability strategy. Rates don't solve the problem — they reprice it.

But that raises a harder question: if higher rates aren't to blame for unaffordability, what actually caused the crisis?

And once you see the real cause, it becomes clear. Debt didn't create this problem, but it can't solve it either.

How we got here

From the postwar era through the early 1980s, homeownership math was straightforward.

Homes cost roughly 2 to 3.5 times household income. A 30-year mortgage with 20% down produced a manageable monthly payment. The ratio drifted gradually — rising from about 2x in the 1960s toward 3.5x by the mid-1980s — but the basic financial architecture held. Incomes and home values moved roughly in step.

Then they stopped.

Starting in the late 1980s and accelerating through the 1990s, home values began pulling away from incomes. By 2000, the ratio had crossed 4x. By the mid-2000s bubble, it briefly exceeded 7x. It corrected after the crash — and then surged again. Today it sits above 5x.

That divergence didn't happen on its own. Multiple forces drove it, and none of them were mortgages.

• Supply fell behind. Decades of restrictive zoning, land use regulation, and chronic underbuilding created a structural shortage that has never been closed. Freddie Mac estimates the U.S. is still roughly 3.7 million housing units short of what's needed — despite adding 5.8 million units since 2020.

• Demand intensified. Millennials — 72 million strong, the largest generation in American history — entered peak homebuying years into a market that hadn't built enough for them. The median age of the first-time homebuyer has climbed to 36, the highest on record, as an entire generation has been forced to delay entry.

• Capital discovered housing. In the wake of the 2008 financial crisis, institutional investors began buying distressed single-family homes at scale — converting them from ownership stock into rental assets. By 2022, 32 large institutional investors owned roughly 450,000 single-family homes, concentrated in markets like Atlanta, Charlotte, and Tampa. That added demand without adding supply.

• And policy — across multiple cycles — poured fuel on prices. After 2008, quantitative easing and sustained low rates stabilized the market but also reinflated values, rewarding those who already owned and pricing out those who didn't. Then came COVID. Emergency rate cuts pushed mortgages below 3%, unleashing a buying frenzy that drove a 40% price surge between 2020 and 2022. When rates snapped back above 6%, prices didn't follow — the same supply shortage and demographic pressure that inflated them kept them elevated. A new generation of buyers was stranded at the peak.

None of this was caused by mortgages themselves. Debt was the mechanism through which buyers participated. It didn't drive the wedge between incomes and home values.

Something else did that.

What debt actually did: widen the divide

Here's where it gets uncomfortable.

While debt didn't cause the affordability crisis, it did something arguably worse: it turned the growing gap between incomes and home values into a wealth divide between those who own and those who don't.

If you bought a home in 2015, your mortgage gave you a ticket to ride the appreciation wave. Your equity grew. Your net worth compounded. Your housing cost was effectively locked in.

If you didn't — because you couldn't save a down payment, couldn't qualify, couldn't compete, or simply weren't at that stage of life yet — you watched from the sidelines. Rents rose. Prices climbed further out of reach. The gap widened every year.

This is the cruel irony of a debt-only housing system: it rewards those already in and punishes those who aren't. And the punishment compounds over time.

The median homeowner's net worth is now roughly 40 times that of the median renter. That's not just a housing statistic. That's a generational wealth story, and debt is the dividing line.

Why more debt can't bridge the gap

The instinct is understandable: if debt is the only tool, make it cheaper. Lower rates. Loosen standards. Extend terms.

We've tried all of these. They don't work, at least not durably.

Lower rates increase buying power, which gets absorbed into prices. I covered this in detail in my last post. The buyer ends up with the same monthly payment, just on a bigger loan for a more expensive home.

Looser standards increase access temporarily — until they don't. We learned that lesson in 2008, and the scars haven't fully healed.

The problem isn't the cost of debt. The problem is that debt alone asks households to bear 100% of the financial burden of an asset that has grown far beyond what incomes can support.

We're asking a 20th-century financing tool to solve a 21st-century affordability problem.

The asset gap, not the income gap

This is the reframe that matters most.

We tend to talk about housing affordability as if it's an income problem — as if people just need to earn more. But incomes have grown. Not fast enough, not evenly, but they've grown.

What's really happened is that housing has shifted from a consumption good into an asset class — and everyday Americans have been locked out of participating because they're only offered one way in: maximum leverage.

Affordability is not an income problem. It's an asset problem.

Professional real estate investors understood this long ago. They don't finance properties with 95% debt. They use a mix of debt and equity — reducing leverage, improving cash flow, managing risk. It's standard practice. It's how capital markets work everywhere.

But for the American homebuyer? The only option is to borrow as much as possible and hope it works out.

That asymmetry — equity for Wall Street, debt-only for Main Street — is the structural flaw at the heart of housing finance.

Bringing equity to Main Street

The fix isn't to make debt cheaper. It's to give homebuyers access to the same financial architecture that professional investors have used for decades.

Co-investment does exactly this. An equity partner contributes alongside the buyer's down payment, reducing the mortgage balance. The buyer takes a smaller loan. Monthly payments drop immediately. Not because rates moved, but because the borrowing amount is lower and the cost of borrowing falls with less leverage.

The numbers are meaningful. Today's typical first-time homebuyer puts 10% down and pays nearly 20% more per month than they would at 20% down. A co-investment that brings the buyer to a 20% down payment closes that gap immediately, delivering the equivalent impact of a 200 basis point rate drop without waiting for the Fed.

More importantly, it drops the income needed to qualify for a median-priced home back within reach of the median American household.

And critically: this doesn't require home prices to fall. It doesn't require policy intervention. It doesn't create winners and losers. It works within the existing market by changing how the home is financed, not by devaluing the asset.

For the millions of households currently priced out of homeownership, this isn't a marginal improvement. It's the difference between continuing to rent indefinitely and beginning to build wealth through ownership.

What comes next

Debt didn't cause the housing crisis. A generation of supply constraints, policy distortions, and capital imbalances did.

But debt can't solve it either — not alone. The gap between incomes and home values is now too wide for our legacy financing instruments to bridge.

The path forward requires expanding the capital stack for owner-occupied housing. Adding an equity layer alongside debt. Making the same tools available to everyday buyers that institutional investors have always had.

This isn't theoretical. The infrastructure exists. The investor appetite is real. The demand is overwhelming.

The question is whether we keep waiting for a rate cycle to bail us out, or whether we build something better.

Previously, I argued that the rate debate is a distraction. But, the point is simpler:

The solution to the housing crisis was never going to come from the debt side of the balance sheet.

It's time to look at the other side.