Well, not to get back on topic or anything....
Walmart's business plan is to drive competitors--especially smaller local stores--out of business. As a carfree cyclist, I find these smaller stores actually provide me with better value than the Walmarts. The savings at Walmart are exaggerated and overstated. The quality of their goods is often lower than the same goods (even the same brand names) bought at a smaller store.
Combine that with the unappealing location of most Walmart stores--far from town and on a busy arterial street. Add in the greater time expenditure of Walmart, and most of them don't even have bike racks, even though they're the largest seller of bikes in the world. Although I do shop occasionally at Walmart and other big box stores, in general I'm happier with my local alternatives.