That seems like a double edged sword. On the one hand, I'm sure every president would like a 50,000 man army to implement their preferred policies. On the other, how does one raise a 50,000 man army these days? This isn't Rome.
Of course, that's the short term "republican makes it into office" solution. Past that, to other presidents, I don't know. In my personal opinion, I think they're banking on never having to get there.
I think their logic is basically "these people function ~identically to if they were democratic political appointees, so we might as well get the benefits of them being political appointees when we're in office". Whether that's actually accurate can be debated, but it's not just "let's not worry about ever losing ever again".