I'd recommend the book The Traitor Baru Cormorant if you want to lean on someone being subsumed and deformed by a power structure into reproducing it. Other angles I don't have so much advice to give - I'm usually just inspired by real life political power structures honestly. So, maybe look critically at how the police and military browbeat new members into compliance and harshly reject anyone who tries to raise their moral standards or hold them accountable.