> The alternative is having bad laws that are enforced just sometimes, at the discretion and personal biases of the not-for profit police.

This happens whether policing is "for profit" or not. Do you think they'll give the mayor or the police chief's spouse a speeding ticket if it means $100 extra in the department budget? These powers are always used selectively. The police just have to avoid using the "bad laws" against a core group of people with political power, and maybe share some of the spoils of enforcement with that group.