Capitalism, as well as racism - throw that in for good measure here, has convinced you to add a little fee to your meal so the restaurant can pay the staff even less than poverty wages!
Yes, tipping started with making sure black people got paid less since they couldn't legally have slaves now. Well, at least not blatant obvious slaves.
Have you noticed appliances and cars fall apart far quicker than antiques? Capitalism convinced you to be cool with that. There is no reason, besides getting you to pay again, a washing machine can't last your whole life and beyond.