I'm always amazed also at how slow cashiers can be. I worked at walmart nearly 20 years ago and briefly they had a bonus for speed. All of the "career" retail cashiers got pissed because new employees who had only been there for a couple months started making more than them, being twice as fast. Visiting walmart and some other stores when there are long lines can be excrutiating as I see cashiers just not caring about speed while wasting time of people in line. Customers should not be able to scan a full cart of items in self-checkout faster than the average cashier.