The other thought is, how else would USA pay the 14 Trillion debt. Would they ever be able to pay that? How long will it keep on paying interest on that debt? Here are my few specs,

World War III - Destroy all the debt holders and restart a new game on the sand board.

Lower the US Dollar value to a level where India, China and Japan will sell their Dollar holding at a 50% - 80% loss back to US. Imagine if the dollar plummets 50% - 80% from where India, China, Japan and the rest of the world has bought dollar at  and then US buys it back at less than half price.

Create a new resource or technology and sell the product to the rest of the world to pay the debt. Revolution in green energy or Technology.

Keep on playing the same game that is going on. The game of  "Lagyo" .  Similar to tol ko dada  who says " Lagyo" to his neighbourhood "Bhatti Pasal" but never ever pays back.