Let’s also try this argument, cribbed from I forget where.
A willing employer and a willing employee agree to trade labor for dollars. Both are happy. It is a free market, after all; if either side did not like the deal, there would be no deal.
Except some busybody steps in and raises a stink about the unfairness of the deal. What gave him a right to interfere?
But, I think our intrepid food workers are saying they're not happy. I am purporting a way to explain the ramifications of the desire to suddenly increase one's wages (either by fiat or strike, as an example) with no fundamental increase in the value provided for that wage.