My perfect world would be a world where almost everything ran on tips, or some sort of a commission or piece rate system. Restaurants are one of the most skewed industries for tipping in my opinion, partly because people get sloshed and become more generous, and a lot of the experience is the food, which servers have little to do with other than bringing it to you. If tipping or some form of piece rate/commission became more adopted by every industry, productivity and customer service would greatly increase. Also tipping in cash is where it's at, because taxation is theft :)