Good article. I think an important part of the idea behind the anti-Walmartism is the idea that Walmart is not only offering low paying jobs to people, but in doing so eliminating higher paying jobs that those people could otherwise take in the stores which a re driven out of business. They can do so because their business model is efficient, and people like their lower prices. But the anti-walmart crowd would argue that the low prices hide a negative externality for society at large, which reduces equity, and is a net utility loss.