I’m not sure that Soros and his cronies do wet work - they don’t need to. First, they only hire people that are both very good at what they do and also ideologically-compatible. Second, he hooks them in but good with money - there’s no way that these people will want to, or be able to afford to, leave.
That said, it wouldn’t surprise me if a few of his past employees “committed suicide” or something similar, like what happens to the enemies of a certain ex-President who enjoys cigars.