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The budget of the federal government is the largest of any organization in human history. It's larger than the entire economy of every foreign country except China. And it mostly grows automatically, without regular input from elected officials.
In the past, huge surges in the national debt were largely caused by wars or recessions. They were temporary. When the war concluded or economic growth resumed, debt as a share of the economy would fall.
That's not how it works anymore. The debt increases due to demographic trends as the bulk of spending goes to programs that serve an aging population. The budget deficit as a share of the economy in 2025, during a peacetime expansion, was larger than any year of the 1930s, the decade of the Great Depression.
Around 2030, the United States is projected to surpass three milestones that illustrate the lack of precedent for the government's fiscal predicament.
According to the Congressional Budget Office, 2030 is the year when federal debt held by the public as a share of the economy will exceed the record set by World War II. Unlike in the '40s, this debt shows no signs of ever declining.
In 1945, 84 percent of federal outlays were on defense, a tsunami of spending that would ebb once World War II concluded. In 2025, 73 percent of federal outlays were on mandatory spending or interest payments, which are legally obligated to continue.
The year 2030 is also roughly when the ratio of seniors to the total population will reach 1 in 5. As recently as 2008, the ratio was around 1 in 8. Seniors' rising share of the population mechanically raises Social Security and Medicare costs and pushes them onto a proportionally smaller working population.
In 1952, there were six people between ages 25 and 64 for every one person 65 or older. That meant there were six people whose wages could be taxed to pay for benefits for every one senior. In 2011, there were four. Today, there are 2.7.
The U.S. always used to be able to count on a naturally rising population as an engine for economic growth, but that will no longer be the case. The only source of population growth after 2030 will be immigration.
That's because 2030 is also the year when the CBO projects that deaths will begin to exceed births. The entitlement programs making up much of the budget were designed under 20th-century demographic expectations that no longer hold true.
Social Security used to take in more money than it gave out, but that money was spent on other things. The program has run annual deficits since 2010. It is projected to go insolvent in 2032, at which point seniors would receive a roughly one-quarter cut in benefits across the board.
Medicare's budget-busting makes Social Security's look modest by comparison. Of the projected $138 trillion budget shortfall over the next 30 years, $109 trillion is from Medicare. Rising health care costs, combined with an aging population receiving far more in benefits than it ever paid in taxes, spells fiscal Armageddon. The Medicare Hospital Insurance trust fund goes insolvent in 2033.
The fiscal challenges scheduled to arrive in the 2030s are actually based on optimistic assumptions. They are from the CBO's baseline estimates, which assume no wars, no recessions, low and stable inflation and no new government programs or tax changes.
Imagine how much worse the debt will look when there is a recession. If, heaven forbid, the U.S. needs to boost defense spending for a protracted war, it doesn't have much room to grow.
Starting with World War II levels of debt and exceeding Great Depression levels of annual deficits, the U.S. is not prepared to face the demographic-induced challenges that loom, let alone world events nobody can predict.
Budget hawks have been talking for years about many of these problems, and it may have felt like not much has happened. The federal budget has been able to withstand more than many expected. But the 2030s is when the bill comes due.
The Washington Post