It works because nobody cares about the deficit.
I'm pretty much a deficit hawk, but I find I kind of have to sit on my hands these days. The deficit is HUGE, but the debt is Treasury bills, which are dirt cheap. The interest rate is so low they're barely worth having, though I have my share, as well. The reason people hold them is because it's the safest stash for cash in the world today. Yeah, the returns are pretty poor, but they're quite reliable, too, so in times of doubt, people pour into US debt. So, with interest rates down around 1%, and people buying hand over fist, it's practically free money for the government. All of us who have treasury bills are the ones loaning them the money, which means lots of Americans, but lots of foreign sources, as well. The world will pay the US bills, even with a puny interest rate, as long as everybody trusts that the US government is good for it.
That's particularly ironic, in this case. After all, there's talk of giving all taxpayers some chunk of money. I don't need it, so what would I do with it if they gave me a check? I'd put it into my rainy day bond fund...which would mean that they'd be going into debt to give me money that I'd use to buy a bit more government debt. That seems very circular.

