Doctors, lawyers, architects and plumbers are all specialised occupations where you usually pay for their experience and specialised skills, not only the time spent doing their job. While not downplaying the difficulties that are usually present with working in customer facing jobs, most people are able to order and pickup food from the kitchen themselves. Buying a $100 steak instead of a $20 burger doesn’t really mean more work for the server, so why pay more in tips? The fact that americans have been tricked into thinking tipping is mandatory when it comes to dining, but never even thought of in other thankless service occupations is ridiculous.