The Federal Reserve isn't fighting inflation—it's keeping Washington's borrowing costs from imploding, and working Americans are paying the difference at the grocery store and the gas pump.
Brookings Institution senior fellow Robin Brooks cut through the noise this week, declaring that Fed Chair Kevin Warsh's zigzagging on rates has nothing to do with price stability. "We're not in hawkish or dovish land," Brooks wrote in a Substack post. "What's happening is yield curve management, which itself is a function of how precarious the U.S. debt picture is."
The debt picture is indeed precarious. Gross national debt sits above $40 trillion. Publicly held debt has hit 100% of GDP. In fiscal year 2026, which ended in September, the federal government's interest costs topped $1 trillion—exceeding defense spending. That is not a typo. Servicing the debt now costs more than funding the military.
Warsh, President Trump's hand-picked Fed chair, has sent nothing but mixed signals. He called inflation a "choice," hinted at alternative inflation gauges over the summer, delivered a hawkish Jackson Hole speech in August, led a unanimous rate hike in September, then held off on another hike last week despite inflation heating up again—offering no explanation. Fortune framed the confusion as puzzling Wall Street. Brooks says the confusion dissolves once you see the real mandate: keeping long-term yields manageable so the debt spiral doesn't accelerate.
"The bottom line is that inflation and other macro data are secondary," Brooks added. "The twists and turns in Fed policy are about what's going on with long-term yields."
Brooks suspects a de facto accord between the Fed and the Treasury Department. Treasury Secretary Scott Bessent announced a surprise buyback of long-term bonds, briefly lowering yields. He also intervened in currency markets to prop up the yen—preventing Japan from selling its U.S. debt holdings, which would have pushed yields higher. Coordinated or not, the effect is the same: the people running the money supply are working to keep the government's credit card from maxing out.
The scheme catches breaks. Fears of an AI bust have eased yield pressure. France's fiscal dysfunction has driven investors back to Treasurys as a safe haven, dropping the 10-year yield back below 5%. But Iran war escalation expectations and a hot economy keep pushing yields and inflation forecasts the other way.
The term for where this leads is fiscal dominance—when debt and deficits override the Fed's ability to independently set monetary policy. Economists have noted that as long as nominal GDP growth stays above interest rates, the U.S. avoids a debt spiral where borrowing costs compound faster than the economy expands. But yields have risen so far and so fast this year that they've blown past long-term estimates, raising alarms about that trajectory.
Warsh is "neither hawk nor dove," Brooks declared. "Instead—like Bessent—he's just trying to keep long-term yields manageable."
The question neither the Fed nor Treasury wants to answer: what happens to working Americans' paychecks when managing yields means letting inflation run—and when the math finally breaks?
