[ZenGum]

I only wander though this thread occasionally, so maybe this was mentioned already, but ...

There is a last resort.

Print cash.

It staves off insolvency for a while. In fact, since US debt is denominated in US dollars, it will mean your debt represents a smaller and smaller percentage of your GDP.

Problem is, it also causes devaluation and possibly hyperinflation. Anyone with cash in the bank, cash under the bed, or an income fixed in dollar amounts, will find their position somewhere between eroded and vapourised.