You should read about the Chicago Parking Meters scandal. The City of Chicago leased all their meter rights to a private corporation on a 75 year lease for a bit over a billion dollars. The private company made it back in the first decade. The city even has to pay the parking company when they have to do construction or throw events that blocks the parking as revenue compensation.

https://en.wikipedia.org/wiki/Chicago_Parking_Meters

This doesn't apply to private pay lots though, so there's still some amount of "choice".