www.thinkprogress.org/economy/2014/01/16/3171251/walmart-leaked-powerpoint-unions/
"Walmart workers currently make an average of $8.81 per hour, more than 25 percent less than at similar retailers, and the majority make less than $25,000. Taxpayers subsidize those low wages and poor benefits. A single 300-worker Walmart store accounts for between $900,000 and $1.7 million per year in public benefits costs for its workers.
By contrast, one of the company’s primary competitors, Costco, pays an average wage of $21.96 and enrolls nearly all of its workers in benefits programs. It reported a quarterly profit of $459 million last spring and of $617 million last summer."