At least some of them must know where it comes from: the American taxpayer - a shrinking constituency. What do you suppose the collateral is on $21 tril + debt? Your job, your house, your children, your retirement... Sooner or later it has to come down to this.
Nope, to them its like a big pot of honey and they think they can take a quart of honey out and then take a piss in the pot and call it even. That’s how Congress manages the money.