Earlier quoted context omitted.
You don’t “hire” the police, and that’s critical. If you did, they would be accountable to you and not the rest of society. Police are agents of the government which is accountable (to some degree) to the people. This is a tremendous distinction.
Police and government have something very important in common with you. They are all just people. Regular people without superior morals, intellectual capability, resolve, etc. In this case a government is just a group of people getting together and saying, "Okay Bob, a few of us in the community have pooled our money together to hire some mercenaries and we'd like you to do the hiring." And then Bob just does it.
We literally cannot remove the police without a collapse of the state and consequently the rest of our civilization, and if you think for even one moment about how that would play out it would be apparent: everything fractures into private armies with no incentive to uphold democratic rule of law; the most powerful private armies become de facto states and their ruler a law unto himself--effectively a king. Obviously modern society can't survive under these conditions--no one can trust rule of law which absolutely underpins our economy. So congratulations, you've rediscovered the dark ages and doomed hundreds of millions to deaths from violence, illness, and starvation. :)