Last week, the total U.S. national debt crossed the $40 trillion mark, a round-number milestone that drew significant attention from mainstream media. At the same time, Treasury Secretary Scott Bessent was enduring a rough week in the news cycle, as his previous interventions in the bond market were widely perceived to have failed. Yet Bessent remained undeterred, and on Thursday he seemed to treat the expanding debt load as a relatively minor issue at the Treasury level. "There's nothing particularly magical about the number $40 trillion; we can absolutely rely on economic growth to work through this debt," Bessent said in an interview with host Sara Eisen. Vice President J.D. Vance also weighed in Thursday evening, stating that with President Trump's backing, Bessent has put forward a plan "to make the U.S. economy grow faster than the debt grows." Vance said on Newsmax: "Even though the debt is high, even though we inherited this debt bomb from the Biden administration, we do have a plan to make economic growth outpace debt expansion, and that's the top priority."

Currently, the U.S. debt-to-GDP ratio sits at roughly 122-124%. Many economists point out that what truly matters is this ratio, not the absolute dollar figure of the debt. However, mainstream budget economists and fiscal analysts are deeply skeptical that economic growth alone can close the debt gap. Critics argue that without structural reforms on both the revenue and spending sides — including potentially rolling back recent tax cuts and reforming the healthcare system — relying purely on growth to tackle $40 trillion in debt is wishful thinking, not a viable fiscal plan.

Why the U.S. Cannot Grow Its Way Out of $40 Trillion in Debt

Kent Smetters of the Wharton School describes the "grow your way out of debt" narrative as a "beautiful story," but one that "clearly lacks real-world feasibility." He believes the logic has the causation backwards: solving the debt problem is what supports economic growth, not the other way around. Bridgewater Associates founder Ray Dalio has warned that a debt crisis could erupt within three years, urging the government to compress the budget deficit to around 3% of GDP — roughly half the current level of nearly 6%. Research from the Committee for a Responsible Federal Budget shows that if the goal is to eliminate the deficit purely through economic growth, the U.S. would need real GDP to grow at an average annual rate of about 4.31% over the next decade. The Congressional Budget Office's baseline forecast through 2036, by contrast, is just 1.8% per year — the former is more than double the latter. As Alicia Garcia-Herrero, chief economist for Asia-Pacific at Natixis, put it: "The U.S. has absolutely no chance of solving its debt problem through economic growth alone."

Why Even AI-Driven Growth Cannot Save the Situation

The structural characteristics of federal spending erect formidable barriers to the "growth pays the debt" theory. Social Security benefits are indexed to both inflation and productivity growth. As a result, even if productivity gains from artificial intelligence were to double, the fiscal picture would hardly improve — because Social Security obligations would rise in tandem. Moreover, the current AI-driven capital investment boom fueling the economy is widely viewed as a cyclical phenomenon; even under optimistic productivity assumptions, it would be insufficient to repair the structural fiscal imbalance. Healthcare spending presents another hurdle: economic prosperity drives up medical professionals' salaries, forcing the government to allocate more funds to retain doctors participating in federal programs like Medicare and Medicaid. Annual U.S. interest payments on the debt have already surpassed $1 trillion, exceeding the defense budget, creating a vicious cycle: higher borrowing costs widen the deficit, forcing the government to issue even more debt.

Warning Signs from the Bond Market

The bond market has already flashed risk signals, with the 30-year Treasury yield recently touching 5.34% — the highest level since 2007 — prompting the Treasury to launch emergency buyback operations of at least $4 billion at a time. Stanley Druckenmiller, Bessent's former mentor from Soros Fund Management, publicly pushed back against the buyback strategy in the Wall Street Journal. He argued that artificially suppressing yields only indulges the government's delay of fiscal reform. John Rowland, senior market strategist and chartered market technician at Barchart, commented that Bessent's bond market intervention amounts to "sending a signal to the market to buy gold." In June, Japan, the UK, and China — the three largest foreign holders of U.S. Treasuries — all reduced their holdings; net purchases by foreign private investors fell more than 40% year-over-year. At this juncture, the credibility of policymakers has become the core variable. If the bond market fails to see tangible improvement within a year of policymakers' growth promises, a self-reinforcing crisis of confidence could erupt — one that no amount of Treasury intervention could contain.