Services are only funded if they are seen to be operating and necessary. A society without crime has no need for policing and justice services to be funded.
The financial incentives in the US private prison system to lock up the poor
Charging Prisoners for Probation Services, and the fact that these charges cause individuals to have to then commit crimes to pay for their probation - a service they pay for to prevent criminal reoffending.
Bail bonds and Plea Deals, Justice for all, and paying for the executioners rope.