I've just never really solved how to apply it to politics. I've long felt that if you're going to have 2 "houses", one ought to be appointed by ballot as a check/balance on the elected members (a variation of hereditary peers in many ways but without the same bias).
It does seem to be the case that someone who doesn't really want the job, but is otherwise qualified, is the best person for it in this case. It seems to me to be very likely that this is true for both politicians, as well as LEO, including the FBI, CIA, and probably all other three letter agencies as well.