@klg20 I think that punishment itself is the main problem when it comes to trying to reduce crime. People need to want to change and punishment tends to make people resistant to that. Rehabilitative justice that helps pull people out of situations where they commit crime and also helps them understand the effects it has on their community would probably work better. I don't think the police take into account the system that much. They probably just do their job and don't overthink it.
@klg20 As others have mentioned, some cops just like the power trip that it gives them to use force without any accountability. The police also have the reputation of helping the community even though they actually cause more problems. People are scared of what would happen if we changed our system and it doesn't work so they don't try to do anything about it. Most of us prefer stability (even if problematic) to potential chaos.