Social Security & Medicair are people's exhibits one and two. Big social programs are not ever dismantled, at least not before now. I suppose that there's always a chance for this happening, but historical precedent isn't very promising.
And, make no mistake, this would be the biggest expansion of the Federal Government, ever. It wouldn't happen overnight, but eventually - and probably faster than many think - the Feds would be in control of one sixth of our GDP. How do you walk that back? You don't.
Reversing or stopping this fiasco would be like trying to turn over a beached whale. Imagine trying to get rid of a lesser entity such as, oh, the Dept. of Education. Tentacles go so far and wide that once installed, this behemoth expansion couldn’t be DYNAMITED out.