The entire restaurant business is propped up by investor money and artificially low wages. We have a large multiple more restaurants than we actually need because it serves Wall St. and the government ("job creation").
Such a change could put 80% of the industry out of business in maybe a year.
And worse, the places where people have smaller dine-out budgets are also where all of the low-wage chain restaurants are clustered. All of those youth and unskilled labor jobs in the suburbs are pretty much in restaurants.
It's inexcusable that people in restaurants are being exploited for their labor, but I think we absolutely have to figure out an alternative before putting them out of work.
If you give wait staff a normal wage, restaurants have to have more workers on hand when it's less busy and there are more other labor laws regarding wage and hour minimums that they'll lose exemptions from.