If you were correct, police departments around the world would be equally corrupt. But living in different cities and countries will quickly persuade you that's

If you were correct, police departments around the world would be equally corrupt. But living in different cities and countries will quickly persuade you that's not the case. Marginal improvements can work if the people making the improvements agree on what "improvement" is. But expecting corrupt cops to get serious about stopping corrupt cops is different. A clean slate (plus structural improvements) may be your best bet.