There’s no job in a restaurant which can be legally 1099’d besides the piano player in the lounge. Restaurants can use staffing firms but then the staffing firm will have to W2 the personnel, and you’re back where you started, unless the Obamacare bureaucracy will let you break up your personnel into a string of 49-employee-max staffing firms ... which somehow I doubt.
I would think there are a lot of paths to take. McDonald's has already tested the technology of outsourcing their drive through order takers to India. If a fast food restaurant redesigns their space to a drive in like Sonic, where people eat in their cars, it will remove the labor involved in keeping their seating areas clean. Many restaurants have moved their drink machines out to the customer areas because the labor involved in getting a drink is more expensive than the drink itself, so they outsource to the customer to get their own drink.
Bit by bit, the labor can be removed from these companies.