[fr_freak]

People don’t tip their plumber when he crawls through the mud under their house in the winter at 10pm, or 10am for that matter, but they are afraid not to tip a waitress.

That's because the plumber will bill you at something like $60/hr or more, while the waitress makes $3/hr plus tips.

[ansel12]

The restaurant charges you, the plumbing company charges you, employees make whatever the business pays them.

You don’t walk out of a restaurant having just paid 3 dollars for your meal and drinks, and they didn’t even drive to your house,