Schweeet!
One small problem...
Laws require 51 Senators and 218 Representatives to vote for them and then require a Presidential signature. If the President vetoes the bill, you then need 67 Senators and 291 Representatives.
The chances of this happening are, shall we say, remote?
The chances of these criminals passing a national sales tax on top of the income tax, however, are quite good.
There are no obstacles to this today - except a vote in Congress and a signature.
Why hasn't it happened yet?