Walmart
A private business's primary obligation is to satisfies it's stockholders. After all, the stockholder's are the people that provide the capital that enables that business to exist. As such, Walmart has certainly satisfied it's investor's over the years by providing a huge return on their investment.

Beyond their obligation to satisfy their investor's a business such as Walmart has an obligation to treat it's vendor's, customer's and employees in a ethical manner. The relationship between a business and it's customers and vendors would seem to be different sides of the same coin. The business is looking for vendors who can provide them with some type of goods or services for the best price, and the customer is looking for the business to do the same for them. Walmart's ability to buy at a low price and pass the savings on to their customers is a benefit to their customers and their customers have rewarded them by giving them more of their business. This also indirectly benefits the community because a thriving business means more jobs for the people living in that community.

Walmart routinely pays it's employees more than minimum wage and provides benefits not required by law. Like any other business Walmart does this in order to attract a labor force capable of doing the jobs that need to be done and not out of any moral obligation to provide some acceptable standard of living. People are free to make the choice to work at Walmart if they wish. If Walmart wants to attract good people that will help them to make a profit, they need to pay those people what they're worth.

I personally do not shop at Walmart. I prefer to shop at smaller stores because I'm willing to pay a little bit more to get the more personal service that you can't get at Walmart. I respect anyone else's right to chose to shop wherever they would like to shop. However, I do find it hypocritical for people to shop at Walmart because of the prices, and then lay the blame for the negative impact of that choice entirely on Walmart. DB