Once, when I was in Seattle, I witnessed a volunteer cajoling a McDonald's employee to sign up for her Fight for 15 campaign. I was going to tell the fellow that he was about to commit economic suicide, but I let it go.
Fast forward a year, and that McDonald's is now a hole in the ground and a new fancy high rise is going up in its place.
If the cost of an activity exceeds its value, that activity will cease. Of course, if the cost can be passed on it will be passed on. So, if you raised the minimum wage to $1M per hour, a hamburger would cost $300k (or more).