The vast majority of government staff are career professionals who know what they are doing, not political appointees who showed up in the past year.

Right, if we change parent-poster's "staffed mostly with" to "controlled mostly by", I think that's an adequate fix.

And who've been subjected to a firing spree I wouldn't wish on my worst enemy. It's the political appointees that are, frankly, there because of the connections and their willingness to, say, "work towards the ultimate leader".