Join the Prison service & tell me what the managers are like, I have never known anywhere as corrupt, we had a scandal involving a prisoner, some staff & mobile phones, some staff received Prison sentences, a particular Governor was called by the Judge, “the most corrupt Governor in the Prison service” did he get jailed? Did he get sacked? No he got promoted & still holds a top job.
A female Officer got promoted because she managed to record the acting Deputy Governor (married to a top Governor who got him his promotion) complimenting her on a blow job she gave him & asking for another one.
A woman who used to sell her body for drugs & cigarettes managed to become a senior drug worker, she was carrying on with our no1 Governor, she got caught bringing drugs into the prison, six members of staff involved all got promoted.
Other cases, people with trades backgrounds do a bit of building/plumbing etc for senior managers & suddenly get promoted.