I agree with you on Wal Mart. I don't shop there, but it's not because they're an "evil corporation" that "exploits third world countries." It's because their stores are disgusting compared to Target and their service sucks. Target will always have someone at the front ready to check you out within a minute or two (I used to work there; when things get too crowded they put out a call for assistance and bring people up front to man extra lanes).
Wal Mart cuts costs by leaving their lanes mostly unused. I've never seen more than four checkout lanes open at a time there, and I don't understand why they put in so many since it seems they never use them. Wait times are excessive. I often have to wait 5-10 minutes just to get out of the store, depending on how bad it is.
K Mart is worse though. Their stores are even dingier and more depressing than Wal Mart, the clientele is even more run down, and they have even longer wait times at the registers. I was waiting for 5 minutes or so in a line that did not move even once (and there were like 6 people ahead of me) before I just left my items on a shelf somewhere and walked out empty handed. I could have been stuck there for 15 minutes or more if I had stayed. Not worth it for some shampoo and earplugs.