With the U.S. national debt now above $40 trillion and interest costs outpacing defense spending, Treasury Secretary Scott Bessent is shifting the debate from spending cuts to economic growth as the path forward
For decades, Washington's approach to the national debt has centered on spending cuts, with lawmakers repeatedly debating commissions, shutdowns, and last-minute debt ceiling increases. The underlying assumption was that the government could manage its obligations as long as borrowing costs stayed low. But that era has ended. On August 18, the gross national debt surpassed $40 trillion, just five months after crossing the $39 trillion mark. At the same time, the yield on 30-year Treasury bonds reached its highest level in nearly 20 years, signaling that markets are demanding higher returns to hold U.S. debt.
In a notable shift, Treasury Secretary Scott Bessent is now making the case that the solution isn't more austerity, but faster economic growth. Speaking on CNBC, Bessent argued that expanding the economy is the only realistic way to manage the mounting debt load. This reframing puts the Treasury at odds with fiscal hawks in both parties, who have long insisted that spending cuts are the only responsible path. Bessent's message is set to take center stage at the upcoming G20 finance ministers' meeting in Asheville, where he will urge global counterparts to prioritize growth over belt-tightening.
Debt Growth Accelerates
The pace of debt accumulation has accelerated dramatically. According to Treasury data, it took nearly 200 years for the U.S. to reach $1 trillion in debt in 1981. The $20 trillion mark was crossed in 2017, $30 trillion in 2022, and the climb from $38 trillion to $40 trillion happened in less than a year. Of the current total, $32.3 trillion is held by the public, while $7.8 trillion is owed to government trust funds and other intragovernmental accounts. The government now spends about $1.1 trillion annually on interest payments-more than it allocates for national defense.
This rapid increase in debt and interest costs has direct consequences for consumers and investors. As the government issues more bonds to finance deficits, the supply of Treasuries rises, pushing yields higher. That, in turn, drives up mortgage rates and reduces the value of bond funds. The iShares 20+ Year Treasury Bond ETF (TLT), for example, has faced persistent pressure as yields have climbed. For a deeper look at how Treasury buybacks are affecting yields and investor risk, see this analysis from Financial Sumo.
Can Growth Outrun the Debt?
Bessent's argument is mathematically plausible-if the economy can grow fast enough. With debt now at roughly 122% of GDP and annual deficits near 6% of GDP, nominal growth of about 5% per year would be needed just to keep the debt-to-GDP ratio from rising further. Stripping out inflation, that means real growth of around 2.5% annually. While not impossible, the U.S. economy has struggled to deliver that kind of sustained growth over the past decade, and any recession would quickly worsen the outlook.
The risk is that betting on growth is not a policy decision Congress can vote on-it's a gamble on future economic performance. If growth falls short, the cost shows up in higher borrowing rates, reduced federal budget flexibility, and increased pressure on household finances. The bond market is already signaling skepticism: the 30-year Treasury yield climbed above 5.3% this week, the highest since 2007, as investors demand greater compensation for holding U.S. debt at these levels.
Market and Policy Implications
For households, the impact is immediate and tangible. Mortgage rates are closely tied to long-term Treasury yields, so as government borrowing rises and investors demand higher returns, home loans become more expensive. The same dynamic affects auto loans, credit cards, and business borrowing. Meanwhile, as more of the federal budget is consumed by interest payments, less is available for other priorities, from infrastructure to social programs.
While the White House has echoed Bessent's focus on growth as the path to stabilizing the debt, budget watchdogs remain unconvinced. Organizations like the Committee for a Responsible Federal Budget and the Bipartisan Policy Center warn that the current trajectory is unsustainable without either higher taxes, lower spending, or a combination of both. In practice, the Treasury is hedging its bets by increasing the size of long-term debt buybacks, aiming to manage supply and support the bond market.
The upcoming G20 meeting in Asheville will test whether Bessent can persuade other major economies to adopt a growth-first approach. If he succeeds, global demand for U.S. debt could help keep yields in check. If not, the U.S. may find itself facing higher borrowing costs and tougher choices about how to manage its obligations.
Understanding the mechanics of government debt is crucial for anyone with a mortgage, retirement account, or exposure to bond funds. When the Treasury borrows more than it collects in revenue, it issues new securities that must be absorbed by investors. If demand is weak or inflation expectations rise, yields increase, raising costs for both the government and consumers. Over time, compounding interest can turn manageable deficits into a much larger fiscal challenge, especially if economic growth fails to keep pace.
