Is Wal-mart A Problem?

Take the simplest example. I buy a quart of milk. I hand the storekeeper money; she gives me the milk. We both benefit, because she wanted the money more than the milk, and I wanted the milk more than the money. This is why often both of us say "thank you." Because it's voluntary, business is win/win. A transaction won't happen unless both parties benefit. Each party ends up better off than he was before. And when you have millions of successful transactions, you end up very well off -- like the owners of Wal-Mart.

John Stossel