What Happened
The US has been running large deficits for decades but the trajectory accelerated after COVID. The 2020 CARES Act ($2.2T), 2021 ARP ($1.9T), and subsequent spending produced deficits of 6-7% of GDP in non-recession years — levels previously seen only during wars and depressions.
Rising interest rates since 2022 compounded the fiscal problem: interest payments on the national debt exceeded $1 trillion for the first time in 2023, now exceeding defense spending. The One Big Beautiful Bill (2025) adds an estimated $3-5 trillion over 10 years. Moody’s downgraded the US sovereign credit rating in May 2025 — the last major agency to do so.
The 30-year Treasury yield hit 5.2% in May 2026 as the bond market digested the fiscal trajectory and legislative expansion. The question being asked: does the US have a debt problem that markets will eventually force a reckoning on, or does reserve currency status provide indefinite fiscal space?
The Mechanism
The debt service spiral and the reserve currency questionRising debt creates rising interest payments which increase the deficit which requires more borrowing which raises debt further — the debt service spiral. For non-reserve currency countries this spiral ends in crisis. For the US, reserve currency status provides exceptional fiscal space: the world must hold dollars, which provides demand for Treasuries, which keeps borrowing costs lower than fundamentals alone would justify. The debate is whether this status is permanent, temporary, or conditional on maintaining fiscal credibility.
What the Consensus Believed
The prevailing view before the reckoning
The US can always borrow in its own currency. Dollar reserve status means Treasury demand is structural. Deficits do not matter when you control the world's reserve currency. The fiscal trajectory is unsustainable but the reckoning is always further away than pessimists predict.
What the Record Shows
Interest rates change the fiscal arithmetic dramatically
At 0% rates, $36T in debt costs nothing to service. At 5%, it costs $1.8T per year. The Fed's rate hike cycle transformed the fiscal outlook from manageable to acute in 24 months.
Reserve currency status is not unconditional
The UK was the world's reserve currency in 1914. It was not by 1945. Reserve status is a function of institutional credibility, economic dominance, and geopolitical power — all of which can erode.
The bond market is the final arbiter
Congress sets fiscal policy. Markets determine its cost. When the UK Gilt crisis hit in 2022, the PM resigned in 45 days. The US has more runway but the mechanism is identical.
↑ Cognitive pattern: Exceptionalism — Assuming US reserve currency status immunizes from fiscal constraints
Key Voices
Bears — Crisis Coming
Paul Tudor Jones
Tudor Investment Corp
“We are going to go bankrupt if we do not address the spending problem. Buy gold, buy bitcoin, buy commodities.”
October 2024 Pending
Stanley Druckenmiller
Duquesne
“I am short US bonds. The fiscal trajectory is unsustainable and the bond market will eventually respond.”
September 2023 Pending
Larry Summers
Harvard
“The fiscal trajectory leads to a crisis within 10-15 years. The only question is whether we fix it proactively or reactively.”
May 2023 Pending
Bulls — Reserve Currency Provides Cover
Stephanie Kelton
Stony Brook
“The US can always print dollars. The real constraint is inflation not default. We choose the inflation path.”
2021 Pending
Olivier Blanchard
PIIE
“When interest rates are below growth rates debt is sustainable. The fiscal position is manageable.”
2019 Partially wrong — rates now above growth