Smart and Evil are not mutually exclusive!
 Walmart has figured out how to get society to pay their bill's and they've created the illusion that they are the kings of bargain shopping!  If one shops at Malwart, it's likely that they paid more then shopping elsewhere. While the average shopper usually selects a variety of common items, several are priced to be a "bargain", but they know that you are likely to purchase other items that they can price above average, thus actually negating any actual cost savings.