The problem with quarantine pandemics-induced splashes of debt and inflation is not an American exclusive one, but could be tracked worldwide, for the pandemics became, in essence, the first act of the proxy-WWIII aimed at globalization refactoring.
You should take a broader look: for the first time in history of the US debt, it still hasn't decreased significantly in the wake of big military campaigns (in the Middle East).
So today there's next to nil margin of safety for economy, but the American Imperial Republic nonetheless is starting to multiply warfare activities in Europe and Indo-Pacific region. Such tactics (I couldn't call it strategy) is as senile as Biden.