Not exactly the same model, though Home Depot might. The difference is how Wal-Mart treats its suppliers and competators. For example, see:
http://www.fastcompany.com/magazine/77/walmart.html
(The bit you need to consider is the impact that this strategy ultimately has on quality. A supplier can't keep making the same goods for less, especially when their own raw material costs go up. They've got to cut something. At first, it may be waste but, ultimately, they'll start to cut quality -- and I think that's already happening.)
If you've got evidence of Target, K-Mart, or Costco doing the same thing, I'd be more than happy to look at it.
They are the same model, what in your pompous little world don't you seem to understand that Costco is the same model as Sam's club? That Target and Kmart buy from many of the same suppliers as Walmart and as such price the product similiarly? That these stores impact communities in the same manner as Walmart?
Please use your amply freedom to explain how these stores are different, I seriously doubt you can, but I am anxiously awaiting your attempt.