There is a school of thought — serious, not fringe — that holds the national debt is a symptom, not the disease. The disease, in this view, is too much tax revenue, which enables both the spending and the borrowing. On this account, the entitlement state did not produce the debt; abundant revenue made the entitlement state possible in the first place. Curb the revenue and you curb the appetite. The debt follows. It is a provocative argument, and it has the virtue of pointing upstream of where most fiscal commentary stops. My argument today runs alongside it, not against it. Whatever the root cause, the arithmetic downstream is the same, and compound interest does not wait for the philosophical debate to be resolved.
The national debt crossed $39 trillion in March 2026, adding roughly $7.2 billion per day. Interest expense now exceeds $1 trillion annually — surpassing both the defense budget and Medicaid individually, and ranking third among all federal expenditure categories behind only Social Security and Medicare. The CBO projects debt held by the public rising from 101% to 120% of GDP by 2036, with cumulative deficits of $23.1 trillion over the decade. Every American household carries an implied share of approximately $288,000 and rising, borrowed without consent to fund programs many will never use.
The structural driver of the spending side is entitlement growth that neither party has shown the courage to reform. Social Security outlays grow from $1.6 trillion to $2.7 trillion by 2036; health care programs from $1.9 trillion to $3.1 trillion. Mandatory spending, entitlements plus interest, already consume more than two-thirds of federal outlays. Discretionary cuts, including DOGE’s genuine efficiency push, cannot close this gap. Analysts estimate DOGE’s savings in the range of $1.4 billion to $7 billion, less than half of 1% of the annual deficit. That’s not waste disposal. That’s rearranging deck chairs. Whether those programs exist because revenue made them possible, or because the political class manufactured the revenue demand to sustain them, the obligations are real either way.
The market signal question deserves a direct answer. Treasury borrows easily. Bid-to-cover ratios remain healthy. No crisis has materialized despite decades of warnings. This is true, and anyone making fiscal arguments should reckon with it honestly rather than waving it away. But the absence of a verdict is not the same as indifference. The term premium on the 10-year Treasury turned positive and climbed above 0.7 percentage points as fiscal uncertainty grew. The Federal Reserve’s own research identifies heightened concern about future federal deficits as a primary driver of elevated far-forward rates, even after 175 basis points of Fed rate cuts failed to drag long yields lower. Markets are whispering. Washington’s hearing aids are out of batteries.
The market has not declared crisis in part because the rules keep changing. No balanced budget amendment. Baseline budgeting that inflates agency spending regardless of performance. A debt ceiling that reliably ends in suspension. The CBO’s own projections still assume Social Security pays full benefits after its trust fund depletes around 2032, hiding a major future spending shock in the official forecast. In private equity, we call that a going-concern issue dressed up in clean audit language. The game is not that markets are blind to the trajectory. The rules have been engineered to delay the reckoning indefinitely, and markets have so far been willing to extend the benefit of the doubt to a country whose reserve currency status buys time no other sovereign enjoys.
Five structural corrections could alter the trajectory: a statutory deficit-to-GDP cap with automatic sequestration triggers that cannot be waived by the same Congress that enacted them; means-testing entitlement benefits to protect genuinely vulnerable households while eliminating transfers to those who do not need them; zero-based budgeting to replace the baseline fiction; a congressional stock trading ban and term limits to remove the financial incentives making legislative inaction personally profitable; and mandatory cost-per-outcome audits for all federal programs, results published. Any institutional investor applying these disciplines to a portfolio company would consider them unremarkable. In government, they are politically toxic precisely because they impose accountability on people whose careers depend on opacity.
Whether the debt is a disease in its own right or a symptom of a deeper revenue pathology, the feedback loop it creates is not theoretical. The gilt market demonstrated in September 2022 what sovereign fiscal credibility repricing looks like when compressed into days rather than quarters. By 2036, net interest payments double to $2.1 trillion, consuming nearly a fifth of all federal spending. The U.S. dollar’s reserve status provides a buffer. It does not provide immunity from compound arithmetic, and it has never been tested against a decade of $1.9 trillion annual deficits with no credible consolidation plan in sight.
Markets have not yet issued the verdict. That is not the same as markets having no opinion. The numbers don’t lie; politicians do. And unlike promises made on a campaign trail, compound interest always delivers.
