For a while, inflation was the big scary word everyone watched. Prices were climbing, the Fed was hiking rates, and your portfolio felt the sting.
But Greg Fleming, who runs Rockefeller Capital Management, says there is a quieter threat that might actually be bigger. That is a number so large it is hard to picture, but Fleming put it plainly in an interview on Bloomberg Wealth with David Rubenstein.
"It's a fantastic amount of money to have borrowed, even for an economy this robust," Fleming said.
The problem is simple. The federal government runs annual deficits of more than 5% of GDP, year after year. That debt keeps piling up, and there is not much political will to stop it.
The combination of a growing national debt and the absence of political will to address it presents a bigger worry than current inflation trends. This rising debt stock threatens to increase borrowing expenses and constrain the Fed's ability to adjust rates.
Fleming said it directly: "We spend more on interest than we do on defense, and that obviously could have rate implications."
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Federal debt stood at over 120% of GDP in 2025, meaning interest costs won't decline quickly.
Despite the debt worries, the U.S. economy is still creating a lot of wealth. According to consulting firm Capgemini, over 700,000 millionaires were minted in the United States in 2025 alone.
"The wealth creation in this country continues to be frankly staggering," Fleming said.
Rockefeller Capital Management works with households that have a minimum of $20 million in assets, and the firm itself had a valuation of $6.6 billion as of October, after a recapitalization orchestrated by Mousse Partners - an investment vehicle controlled by the Chanel family - with participation from family-backed investors Progeny 3 and Abrams Capital. In 2018, Viking Global Investors bought a controlling interest in Rockefeller & Co., and Fleming noted that current owners are satisfied.
He also said he does not plan to take the company public soon. So for now, it stays private.
The debt situation is not a cliff you fall off tomorrow. It is a slow squeeze that raises rates and limits what the Fed can do.
Everyone is watching new Fed Chair Kevin Warsh to see how he handles a messy mix: a giant debt pile, AI-driven productivity gains that could boost growth, and an ongoing energy shock. That is a lot of crosswinds.
For Rockefeller, AI is part of the answer. But Fleming is clear that AI will not replace the human side. "The work we do with families, there's a lot of complexity… You're dealing with the human beings," he said.
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