I worked in the parking biz for a decade. It's an industry that attracts a lot of scumminess because a lot of money passes through it and controls are lax. We

I worked in the parking biz for a decade. It's an industry that attracts a lot of scumminess because a lot of money passes through it and controls are lax. We had more than one customer unhappy with our system because it generated tight, accurate audit reports which meant that nobody could skim. I also recall an effort to put all parking meters in San Francisco under the purview of the department of weights and measures, but IDK if that was successful.