IME 'you're overqualified' = authoritarian management. A classic book worth reading is 'On the psychology of military incompetence' by Norman F. Dixon, if you don't mind extrapolating the observations to other contexts.
If you're 'over-qualified' for a particular job, then you're either going to be promoted or switch jobs very quickly. In either case, the company still has to spend a lot of time and money training your replacement.
