Tipping is the brilliance of the restaurant industry. Keeps overhead low and allows them to churn through "employees" with promises of tips.
Some say restaurants can't survive with more costs. Baloney. If you can't pay a decent wage you don't deserve to exist.
The only people that care about prices going up are the no tippers because the tippers are subsidizing salaries. The tippers wouldn't notice prices going up much if any.