In the North-east and Westcoast, high cost areas, you could pay wage that and be fine.
No you couldn’t...run the numbers...with minimal profits why do it?
Before the last recession started, the starting wage for a fast food worker in my part of flyover country was more than $10 a hour. I am not sure what it is now, but with unemployment at ~8.5% in my area I think it safe to say that it is less than $10 a hour. If they raised the minimum wage to $15 here, that would kill off just about every food joint except fast food joints in the highest traffic corridors.