The web site for the project is, appropriately, 
Via Jishman, we have this wonderful article about Trader Joe’s. I wonder if this is still true with Aldi now owning the chain:
Coulombe also wanted to make sure his employees were paid fairly, instituting a policy in the 1960s that full-time employees had to make at least the median household income for their communities—an average of $7,000 a year at the time, $48,000 today. Store captains, almost all of whom are promoted from within, can make six figures annually. Trader Joe’s also allows part-timers to earn health-care benefits, a feature that makes the store a haven for artists, musicians, and other creative types who wouldn’t normally seek supermarket jobs.
That’s pretty amazing considering that minimum wage puts you under $20K per year, and the median is the minimum at TJs.