Wal-Martification of the economy
It's funny you should ask this. The answer is that companies, from makers of cosmetics to microwaves are all being forced to do business and manufacturing overseas to sell at America's largest store - and meet the Wal-Mart buyer's demanded price.
If you don't sell it to them at the price they want, they will go out of their way to put you out of business:
A primer on Wal-Mart