Voluntaryists have been calling for the defunding of the police for decades now. This is because we understand that incentives matter. The police will do what you pay them to do. When the State uses government power to incentive the militarization of the police then that is what we will get- police who who see their cities as battlefields and everyone in them as a threat to beaten or killed. If you want to change this you have to change not only the relationship of the police to the government, you have to sever it altogether.