I have no idea how many other people are like this, but I already don't look at my receipts when I'm in a grocery store. If I do, it's because I realized I forgot something and want to know if I actually forgot something. So for me, the experience ends up being the same.
Sure, I often don't pay attention either. But once in a while, I notice something wrong anyway, and also I'm free-riding on the fact that some people pay more attention.
A store that is arranging things so that there are no checks is a store that is going to profit from its own mistakes. Impersonal forces will drive it to do so regardless of particular human intentions.
There’s an old joke about a guy making money downtown exchanging $5 bills for five $1 bills. When asked how makes money the response is, “Well, I never make a mistake...”
