Tipping isn't charity, nor begging. It's applause.
I've been to the same restaurant several times and tipped differently more than half of the time.
The waitress/waiter who recites the specials, takes the order and brings the food gets 10-15%.
The waitress/waiter who recites the specials-answers questions clearly and cheerfully, takes the order, brings the food, actually CHECKs to see to everything is correct
(I've had waiters ask "how is everything? as they speed by at 15 miles per hour. No one has any time to say anything.) Then stays alert to any other needs we might have --gets 20%. Maybe more.
They don't have to try to be my best new friend, they just need to make me feel like a guest in their restaurant.
If all the waitstaff is paid the same, there is no incentive for them to do anything but slog the meal to the table. Really good waiters/waitresses can be a fount of information: about what specials seem to be better than others, about what's in a sauce and how long something might take to prepare (in case you are trying to make an 8PM curtain at a theater six blocks away.) In other words, they can improve the restaurant's chances of having a returning customer.
No tips? What do they care about whether you got that second beer?
They make the same money.
Oops, they didn't make sure that you got your side salad. So what? Take it off the bill, Okay.
They still make the same money.
You're not coming back, but they still made the same money.
~~
We had a really rude waiter one night at Sarabeth's
http://www.sarabethswest.com/ That NEVER happens. He was just awful. Got the orders wrong, disappeared for a long time, never brought the check. A bunch of stuff. But when he showed up after the check had been brought and actually looked at the tip amount we had left and COMPLAINED about it, my host said "Oh, yes, let me fix that."
And he took the receipt and carefully scratched out the tip amount and then wrote ZERO next to the blackened square.
Joe(we applauded him.)Nation