I have seen that documentary. But I am still a fan of Walmart. What they do with regards to employee health insurance and stuff is way better than what manufactures do in a majority of developing countries. How do you think the entire manufacturing sector works in Asian countries. Almost any electronic item you buy would have components from taiwan, malaysia, china etc. If you start boycotting products based upon the exploitative labor conditions, you would have none of the gadgets that you are used to.
Regarding the shutting down of local stores, why not?? It is a capitalistic setup - why would I want to pay a higher price for a product just because it is a traditional family owned business? I couldn't care less about that.
Regarding Walmart opening up america to chinese market, yeah, what else would you expect from a free market?