Wal-Mart has become one of America’s most successful retail chains by offering everyday goods at low prices for working families. But just how is Wal-Mart able to charge less than many of their rivals, and what has their success done for their employees? Documentary filmmaker Robert Greenwald takes a look inside the discount retailer’s empire in Wal-Mart: The High Cost of Low Price, and discovers a company short on scruples and long on shabby treatment of the people who work for them.