Yep, its called the Beauty Premium. There's evidence that being attractive leads to better job outcomes in most industries including higher starting salaries, more job offers, faster promotions, and better performance evaluations.

100% this! I hate how the main narrative it seems like Americans believe about tipping, especially among a certain set of privileged college-educated Democrat types, is that tipping is this virtuous practice that benefits the underclass so much, when really, it benefits restaurant owners most, and if any workers are better off under a tipping system, it's a small minority, like highly attractive white female servers in establishments that have rich clientele. Everyone else would be better off if prices (not a surcharge) went up once by 20% and restaurants spent that money on wages and abolished all tipping.

And evidence correlating being a minority with lower tips.