It's not at all clear that working at Safeway would enable someone to live here. In San Francisco, the current minimum wage is $13/hour, going up to $14 on July 1. For the state of California, the current minimum is $10.50. I suspect the grocery chain pays at least slightly above these levels for new hires. These aren't "living wages," exactly. According to an MIT Living Wage Calculator, a single adult working full time while living here would need to make $16.13 to enjoy a "normal" standard of living. Since the calculator assumes a minimum wage lower than the actual legal minimum, this seems suspiciously low.
Whew! My emphasis.