Normally I'd agree but in this case the OP seems to have been talking about the default choices going upwards of 20%. I can't imagine at most places waitstaff g

Normally I'd agree but in this case the OP seems to have been talking about the default choices going upwards of 20%. I can't imagine at most places waitstaff getting to program the payment terminal's default choices. It's the owner who made that decision and they are ultimately responsible for how they encourage/discourage tipping and compensate their staff. 30% suggested tip might seem nice initially but it might also drive away customers in the longer run. And those customers will never protest much, they'll just leave and not come back. It also signals that "look, we are going above and beyond with our service, we deserve a 30% add-on", but when in reality their service is most basic, or even worse than before, there is a disconnect that people notice.