“People in the service industry work for low wages and tips help to boost that income, and I have absolutely no issue with that. But it should be what you feel is reasonable, not a percentage of the amount of food you can stuff in your face.
But why do we tip some people and not others? It seems we’re expected to tip waitresses, cab drivers, barbers and yet not midwives or nurses. We tip a waitress for bringing us a meal, yet we don’t tip a barman for serving us a pint. Okay, we might occasionally say, '… And one for yourself,' to the barman but even that’s mostly dying out nowadays”