You've got a cartoonish view of Keynesianism. Where did you get it from?
For example, Keynes advocated that governments spend the money that they HAVE (saved from budget surpluses when the times are good) to help the economy recover from a recession - and it is not a bad idea, per se.
The problem is that the US government has never had a surplus in recent history (save for one year 20 years ago).
Hence money printing.