USA's military budget is much higher than the sum of all other nations military budgets while it includes only 5% of world's population.
Roughly near $900 Billions versus $500 Billions Dollars in 2023.
https://www.nationalpriorities.org/blog/2023/05/04/us-still-...
https://www.pgpf.org/article/the-united-states-spends-more-o...
But from now most nations and other economic investors will be hesitant to buy USA's debt, as its behavior is less and less predictable. The main problem is what to buy instead.
Europe, sadly, knows all about pain.