Our paper money is not backed by anything but trust in the US government now. Richard Nixon, (Republican), took us off the gold standard back in the 70s. Yes, he was a "Keynesian."
And yes, I do know a bit about macro - and micro - economics, having been a history teacher for over 20 years, tyvm.
Keynesian economics - prime the pump. Turn the downward spiral around through deficit spending. It is through this type of priming the pump that the economy gets running again. Otherwise, it stays in a downward spiral.

So, thank you for letting me know what I understand. I guess I just don't know what I'd do without you telling me!

It's just lovely when others assume.....

I'm outta here.

Peace!