The fines aren't there to increase revenue, though that's a perk. They are there to encourage you to make do without a car in SF.
Q: Why did the City of Oakland raise parking meter fees, increase fines and extend and parking meter enforcement hours?
A: The City of Oakland’s recent decision to raise parking meter fees and increase some fines was made in response to the most serious financial crisis ever faced by the City, and it accompanied significant cuts to vital public services, including police, libraries, parks and maintenance. Although City leaders recognize that this decision is unpopular and difficult for many residents, it was an unfortunate necessity given the magnitude of Oakland’s budget deficit.
So WHEN if EVER are those cities not in a financial crisis?