Greenpeace

People point to Walmart and cry "anti-union".
Unions enable disfavored people to live satisfactorly without addressing their disfavor. This way their family's problems are never resolved. Without the union they would have to accept the heirarchy, their own inferiority.
Unions serve to empower.
Walmart is anti-union because they are good. They try to help people address and resolve their problems by creating an enviornment where there are fewer hurdles.

Media ridicule and lawsuits are creations to reinforce people's belief that Walmart is evil in a subsegment of the indistry dominated by the middle and lower classes.
Low-cost disfavored Chinese labor is utilized by corporate america to maximize margins. They all do it. Only WalMart gets fingered because they are the ones who help, and those who seek to create confusion in the marketplace want to eliminate the vast middle class who have a real chance and instead stick with lower classes who may not work otherwise. So they dirty him up while allowing the others to appear clean.

I believe the coining of the term "Uncle Sam" was a clue alluding to just this::Sam Walton's WalMart is one of few saviors of the peasant class.