There are precautions that Walmart takes to control a cashier's interaction with customers, including facemasks, a healthy supply of hand sanitizer, plastic shields, etc. A Walmart cashier also doesn't have to hold a runner on first or have a runner sliding into their cash register.
I just can't see this going the way that they expect. Who knows, I could be wrong, European soccer leagues are in full swing with no fans, and there is all kinds of non-social distancing going on there.