So if there's no tipping, you think high end restaurants would completely change their format to buy your food at a counter and find your own seat model
Who said anything about $15? Let the market decide what their wage is, just don't allow them to go below minimum wage. They could survive, else they'd find a better job. And I don't need them to take care of me, I just need them to do what they're paid to do...take my order, bring my food. Just like if I walk into Best Buy, buy a tv, they go get it from the back.
You want to have a high end restaurant, pay your workers more to attract a higher crop of personnel. Every other industry acts that way, but we've been duped into letting this industry act under a different set of rules.