The world did fine without police for thousands of years.
Exactly right. You can’t have a police state without police.
Throughout most of history, governments left almost everyone pretty much alone — because governments could not track people, didn’t have databases, and didn’t have police. Being a peasant wasn’t a good thing, but you were pretty much left to your own devices.
Today, the government knows all, and if your social credit score dips, the police will come knocking.