There's nothing wrong with Wal-Mart, or their business practices, up to and including subjugating their vendors like field slaves. I have no sorrow for anyone involved in any of the company's transactions - vendor or employee.
You volunteered, knew what you were getting into, and have to live with the results.
Without overseas goods and the volume to dictate incredibly small profit margins by their suppliers, the institution couldn't exist in the magnitude it enjoys presently, facilitated by the greed of the American consumer. The store is simply the forerunner of what our entire retail society is going to evolve into in the next couple of decades. There's a finite amount of wealth in the world - generally - and the rest of the globe will quickly catch up to us.
They want the American dream too - and there's only so much rice in the bowl.