It happens often enough. I don’t want to give exact names, as that would possibly dox me, but 1) as an idealistic young person I worked for a time in the central office of an org where both ordinary staff and management admitted that they had long since lost interest in the mission, but the position was comfortable and required little actual work, and since the board consisted of some pretty acquiescing and clueless people, they were able to ensure regular pay increases. 2) One 501c3 I have been active in, dedicated to a certain hobby, is currently riven by scandal because the board hired a new director who, according to tax filings, gets a big salary for only a few hours of work a week, and this is only one of several business ventures she has going on, and the others look like outright grifts.