otherwise the amount of the wealth produced by workers would halve and that would make the 1% (who get most of it) pretty sad.

I would bet that, the GOP bets that, these vacancies would be covered by men, automation, immigrant labor^1^, and offshoring. But that still allows those on top to retain wealth - they really don't care about a healthy middle class. That leaves all the best, desirable jobs to men which is exactly where they want things. I'm not saying it's at all a sane or even realistic plan, but rather, that's an outcome that's in line with this insane ideology they call a political platform.

^1^ - skilled jobs can be covered by work visas.