Have you read "Cruising for Parking" (
http://shoup.bol.ucla.edu/Cruising.pdf), "People, Parking, and Cities," or "The High Cost of Free Parking"? If not, to paraphrase Rep. DeFazio (D-OR) the other day, you have nothing to add here. There is extensive literature from Donald Shoup, Robert Cervero, and others about how cheap (or free) and abundant parking makes housing more expensive, undermines transit ridership, distorts the built form of cities, leads to sprawl, and leads to greater vehicle congestion. I understand your libertarian theology but some times theology buts up against real life.