Also, this doesn't make any sense to me.
Costco is basically just a big warehouse where you buy everything in bulk. I think he's saying that it's a supplier for small businesses and so forth as well as just a place where suburbanites buy groceries or whatever. Like instead of buying a little bag of Snickers Fun Size like they have at Walgreen's or whatever, you get the big box of Snickers bars that high school concession stands would buy. Also, you have to pay an annual membership fee, and it's not really just a nominal one, I don't think.
I don't see how these differences between Costco and Wal-Mart would prevent Wal-Mart from providing its workers the type of pay & benefits (hell, even half of the pay & benefits) that Costco provides its workers.
I guess I just wish more CEOs would recognize the benefit of a happy, healthy workforce the way Costco's does. From what I've read, Costco has a healthy profit margin, too.