My mom works in a middle school with a newly hired "severe behavior class" teacher who is woefully under-qualified. Because the new teacher is unable to adequately do her job, several administrators and other teachers routinely have to spend their extra time pitching in to take case-load from this teacher or chase kids around the school when she can't handle them. It's absolutely bonkers.
If anything, hiring inept people will make the qualified folks want to stick around less. This has the opportunity to be bad-upon-bad! Yay!