Unfortunately, there are a LOT of Republicans who would vote for this bill if they had the guts and didn't mind becoming unelectable. This goes far beyond political parties. And once instituted, it will never be repealed.
Can you recall ONE government creation that has EVER been repealed?
Well, more than one, but the easiest to recall is prohibition. That took about 10 or so years to do but it happened. Your point is valid, however, it is best to not ever pass something like this. Relying on repeals is tricky.