Residential parking?

Biking home in Sunnyvale down Astoria, past Wright, I noticed a number of signs stating "resident parking only". This is in an area where most houses have two and three car garages (with space for at least 2 or 3 more cars on the driveway.) The city requires houses to have 4 parking spots, and many of the houses exceed this.

If the city is willing to spend the money to post signs giving these residents semi-private use of previous public parking, why is it also requiring them to have devote much of their lot to providing additional parking for cars? And furthermore, if street parking is so important, why does it let developers rip out street parking to add multiple private driveways (often leading to private roads with no street parking.)

It probably just comes down to a hidden method of discrimination. Require excessive space devoted to non-living areas, thus keeping property values high. Then donate those 'public' resources in the area to the local residents. In order to not appear too callous, funds can be allocated to subsidized housing. However, these are often kept away from the monolithic single family areas (often in isolated new developments disconnected from most public amenities.) The city also gets to serve as a gatekeeper, allowing it to enforce some restriction of access.

Removing parking requirements and regulations would be the free market solution to obtaining the proper allocation of parking space. However, that would hurt some of the 'sinister' motives in parking policy. Thus we are left with pockets of parking shortages, even while having a huge glut of parking spaces in the city.