There is one supermarket in my town and they just incorporated two do-it-yourself grocery checkout aisles. I'm sure this is something you city-folk have been using for years, but they're new to me. I like them. For one, I seem to be WAY faster at scanning my shit than the people who do it professionally. I also get to avoid something I loathe - small talk. Besides, as a bachelor, it's a little embarassing to go in, week after week, and buy the same frozen pizzas and ice cream novelties (not to mention all the anti-diarrheal medicine).
You'd say these things are supplanting jobs. May I remind you we are in a War On Terror? Come on, people! Just think of all the men and women that will now be available to help us defeat radical extremists all around the world. It's a classic win-win!