Do we need to tip as much as we do?
Americans Say Tipping Has Gotten Out Of Control
Most Americans think tipping is tripping.
A new WalletHub survey found three out of four Americans said tipping “has gotten out of control.”
While tipping is customary for sit-down meals, digital technology has added the pressure to tip for take-out and other non-restaurant services. 
Half of the people surveyed said they tip because of social pressure, while a quarter of the respondents said they tip less when a screen prompt to give extra comes up.
https://www.eatthis.com/americans-say-tipping-is-out-of-control/