That has a number of citizens' groups up in arms, arguing that the city exploits the parking situation to replenish the coffers. For some, such as a group in Los Angeles called the Los Angeles Parking Freedom Initiative, that issue means pushing for a reduction in costs and fines. For other groups, it means a whole-sale elimination of parking fees and fines.
The Week has an excellent write-up of a surprisingly interesting topic, analyzing whether parking is a civil right (it isn't) and why we simply don't have free parking. It's worth a read, so head over and take a look.