A good description of how restrictive zoning screws with affordable housing

From Coyote Blog:

Step 1:  Progressives argue for having government restrict land use and implement tight zoning.  Step 2:  Housing prices skyrocket, enriching the elite and making it tough for ordinary workers to own housing.  Step 3:  Progressives decry that lack of affordable housing represents a 'market failure' that must be addressed with more regulation.  For example, builders in the SF Bay Area are required to sell X number of below market rate 'affordable' homes for every Y homes they sell at market rates.  Step 4:  Builders costs go up from the new regulations, further reducing supply and increasing prices.  And the cycle just repeats, as bad outcomes from government regulation are blamed on free markets, and used to justify more regulation.

This earns it a spot in my economics blog links.