VD Hanson's journey across California

Quite interesting commentary about California's "poor":

A new cohort between 21 and 30 is becoming a lost generation — and with good reason. They don’t seem to be working full-time or have good jobs with secure futures. Instead, from construction to teaching, there are far fewer sustainable careers for young people. But given family ties, they can live at home, postpone marriage, find part-time work, and rely on essentials like rent and food from the old embryo, while using what little is made for discretionary spending — allowing the veneer of middle class opulence to continue.

That is, for a deep recession, there seems to be a lot of young people out on weekdays at about 10 AM at stores, with good clothes and appurtenances, and apparently no substantial incomes. Is this sustainable, this ability to have discretionary spending, while outsourcing housing and food to one’s parents?