Easy as heck to implement. Union pensions are managed as a pool. When a union member commits a violation, it gets paid for out of the pool and the entire union suffers. The first time that a police officer violates civil rights, that officer will get crucified and it will never happen again.
In the current system, the community paying for the police foots the bill and there is no accountability. In the system I’m proposing the police are directly accountable for conduct, with more Sr. personal being more accountable (because they are more heavily vested in the pension).
This approach can even be used to promote furthering the development of unions. Its a win win win.