Receipt checkers aren't there to catch shoplifters

You're wheeling your haul out of Costco only to be accosted by the receipt-checker at the exit. You're fine, though, because you're not shoplifting anything. That slightly annoying feeling that the store assumes you're a criminal, it turns out, is tragically unwarranted, because those guys don't even care if you're shoplifting. In fact, the receipt-checkers are some kind of internal store Gestapo keeping tabs on the checkout cashiers.
Writes one former employee: “Trust me, we’re not loss prevention, we have loss prevention in the store and that’s not us. We’re literally just trying to make sure our cashiers do the job right, and when we DO catch it, all the information gets stored. Who did it, what time, etc...and those cashiers get spoken to. This is not to benefit anyone but the member to improve the experience overall.”
It's useful to remember that everything is not only worse than you think it is, but in ways you haven't yet considered.