The next owners did raise the prices.
We always had tons of customers without having to advertise, so we knew we could raise the prices — that most anyone would advise us to do so — but it was important to us that folks on low incomes could always afford the food.
I think tips can be a great opportunity for affluent folks to share their good fortune.
I wish that when higher-income people decided whether to tip, they asked themselves whether the workers were earning more or less than them. And if they thought less, then tip.
Meanwhile, this is an interesting study where customers rated restaurants lower when they got rid of tipping.