I find little of interest in that. The US enforces private property in a far more aggressive manner than most other countries, and the definition of public property, and functional amount thereof, are also very different. Merely laying down behind a bush can be a violation of "Illegal Camping within City Limits"/

Additionally, rent can easily be inaccessible for the employed. And for those who don't have vehicles, 'just moving to a cheaper area" is not a practical option.