All economics has prices and costs.
Why do employees not sell their products at double the current rate?
Because there comes a point where they cost themselves out of the market.
The same applies to wages.
Almost every economic study on this issue of minimum wages reveals a wage set at 50% of the medium wage in the economy does not price out the worker or damage employment but it does increase consumer demand. As a consumer economy in a period of demand collapse such is one critical and instant measure needed to increase employment over all. It was needed given the terrible rates of working poverty in the US before the pandemic shut downs.
A 15$ minimum wage is well below that 50% threshold.
I see you avoided my question. In any case, there is a theory that leftists hate, it's called action/ reaction. You see, when you take an action against somebody or some people, in most cases there will be a reaction.
Force all industry and companies to pay much more in labor costs, they are going to react, and it won't be positively either. They will make more automation investments, use more outsourcing, move overseas taking their jobs with them, cut employee benefits or lay employees off. When all else fails, increase the cost of products or services.
When those costs go up, it creates inflation and much higher cost of living. Like I said before, people making minimum wage today will be no better off in two or three years after making $15.00 per hour.
The city of Cleveland introduced a $15.00 an hour minimum wage. Every representative voted it down. After doing some research, what they found was that by having a $15.00 minimum wage in their city, industry would pack up and move to the suburbs. Then they approached the county with their idea, and the county rejected it for the same reason: Industry will pack up and move to another county.
Action/ reaction.