Try to focus. The debate here is not whether US foreign aid is Constitutional (which is an interesting thesis), it's if you can consider that aid a global tax. And the answer is................of course not. The monies are given freely .
As for our dues to the UN, they're just that, dues to be part of a club. No tax there, either.
Sorry, but the subject I raised was the constitutionality of the President promising an increase in foreign aid. If you'd rather not look at whether that's a legitimate power of the President's office, then don't presume to lecture the rest of us on what he can and can't do. He has a job description which is defined in the Constitution. We've never amended the Constitution to give the President power to hand our money over to anyone without our consent.
He is empowered to make treaties with the advice and consent of the Senate, not to tell a bunch of penniless con artists that he'll hand them $5 billion dollars. Bush doesn't have that authority unless he's talking about his own money. I doubt he has that kind of money, myself.