Rebuild into socialism?
Rebuild into communism?
Reset into early stage capitalism (lack of regulation and all)?
How do you know that those systems won’t also have their own late stage failure? Case in point, the NHS right now.
(Edit, posting too fast: To the person below who suggested 90% tax rates; the US never had those rates. On paper they did, but they had more and larger exceptions than now, to the point the effective rate never exceeded 45% anyway. This is also why the massive cut was politically palatable - it was cutting the rates to closer reflect the reality. At no point did the US ever have anything close, or even half close, to 90% effective rates.)