A business that has built itself on the corpses of all the other companies they have driven into the ground. Wal-mart has been a big influence in the drive to move manufacturing to China in order to save costs. They constantly push companies to make things cheaper, no matter the cost to quality.
They move into a town and drive all the smaller businesses out of business(who, coincidentally, paid their employees more and treated them better), and make property values plummet. Then, half the time, they close down that Wal Mart so they can build a new one down the road a bit. Ohio has seen this repeatedly recently, and now have over a dozen empty Wal Mart buildings in small towns, further dropping property values.
Wal Mart is an evil company that has driven itself up on the corpses of smaller companies and the broken backs of their abused employees, who have to put up with abuse, unpaid work, either no insurance or extremely expensive insurance, and wages that would require you to work 3 jobs to get over the poverty line.