Under the Executive Order that's what would happen. I think Trump is banking on Congress not willing to have voters take a big financial hit having to pay them back but I think he is badly mistaken in that. If the Democrats can blame the tax bill on Trump then they'll do that in a New York minute.
It would have been more fun for him to totally abolish feral withholding, but that is not going to happen.
He said in the press conference that his plan for his second term is to reduce or eliminate the tax entirely. But doing away with Social Security and Medicare is not something the House and Senate are dumb enough to sign on to. Trump may never have another election but they do. And seniors vote.
I would not support social security ban.
Unfortunately that is the only retirement income for many people.
I am very okay with a withholding ban. But, a delay is not a ban.
Interesting times.