I’ve got a demographic that has millennials beat at being deadbeats: native Americans AKA Indians.
Tipping is a bad practice that need to die. It is now an expectation, rather than a privilege, to receive a tip, and the incentive to provide good service is lost. It is not fair to shake down people in such a manner, and the US would do well to abandon the entire scheme.
I tip pretty good. I don’t know about the rest of them.
There’s another famous demographic, too.