Why does Walmart suck the life from it's employees?

I used to work for Wal Mart prior to Sam Walton's death. We were treated well as employees then. We had profit sharing, health insurance and we were not worked to death. It is different now that it is a publicly traded stock corporation. The profits go to the shareholders and the owners the Waltons. Some Wal Marts are better than others because they have better managers and others suffer because their Wal Marts have crummy managers. So the answer to your question is PROFIT.