This is actually pretty easy if you build a limited number of stores in the higher income areas of town and charge an admission fee to people with higher incomes. There are 10x as many Walmarts as Costcos and they serve everyone. Costco didn't even accept food stamps until recently and they still don't everywhere. Under these circumstances it's easy to pay more and have higher revenue per employee.

Meanwhile you don't even notice the Dutch jingoism. Can't resist a bit of Yank bashing though, can we?

The Walton Family Foundation is a charitable institution, giving more than any other business. National Audubon Society, Harvard University, Georgetown University, Nature Conservancy, Inc., etc. What profit do they get for giving millions to these?

Just ignore the fact that breaking CFCs leads to mercury poisoning, the higher cost, lower quality light, etc.