Maybe in your neck of the woods, but lots of places don't have Trader Joes. I already see a LOT of rich people at the WalMart I shop in...the parking lot is full of their cars... they are the first to know a good deal when they see one, that's how they got to be rich in the first place.
Yep. One is filled with recent immigrants shoving eachother (in Urdu, Somali, Russian, and Spanish) for the $100 DVD Multidisk player, the other one filled with Tweakers and folks who just rolled out of the trailer park.
I know that Wal Marts do attract folks from across the spectrum, but in my area (currently in the Seattle area) they do not. I still believe that they are making a mistake in trying to pick off new demo groups instead of focusing on and IMPROVING their core business model.