Hmm, I got curious and read Wikipedia:

> Levittowns are six large suburban housing developments, three of which are actually named "Levittown." They were created in the United States (including one in Puerto Rico) by William J. Levitt and his company Levitt & Sons. Built after World War II for returning white veterans and their new families, the communities offered attractive alternatives to cramped central city locations and apartments. The Veterans Administration and the Federal Housing Administration (FHA) guaranteed builders that qualified veterans could buy housing for a fraction of rental costs. Under Levitt & Sons, Levittown housing would maintain racial covenants that excluded non-White would-be buyers.

Italics added. Seems the government was somewhat involved in the US too. Of course, now the reason "the free market is terrible at pumping out houses" is government regulation too....