Giving it to everyone, period, is not mathematically tenable. A thousand dollars per month to every adult US citizen would represent over 2 trillion dollars in additional spending per year. At the very least you have to change the tax structure to claw it back from people as they earn more money.
It would be a massive net increase in spending and it's not even remotely tenable without changing the tax structure specifically to claw the basic income itself back from most of the recipients.
