https://www.investopedia.com/terms/k/keynesianeconomics.asp
Perhaps you can reflect on the Fed printing an additional FOUR TRILLION DOLLARS of fiat money in the last two months without any corresponding increase in goods available to buy with that money. Please consider the following in your reply.
As bad as US public finances are, other developed nation economies are in worse shape with higher levels of indebtedness. If hyperinflation is in the offing, they will suffer it first, with the dollar actually benefitting.