I travel quite a bit so I get to several stores around the US. You have employees that do not meet what I think and what you should expect as professionals working in the stores.
Examples: Checkers with bad teeth, body piercing on all parts of the face, young men with pants hanging half down their butt and oversized earrings. To me, it looks like you have gang members working for you. Point is, I do not think your stores are showing the professional attitude that they should. When I go to checkout, I don't expect to be greeted by someone who looks like some tribe in the jungle when you live in America.
I have left the store on checkout when these sloppy people have been there to check me out.
I left merchandise on the counter and walked out. I always thought Walmart was a professional business.