They are the same side of the same coin, the law that a person doesn’t belong to themself.
Why is slavery immoral? Because of coercion. That’s the same reason that forcing an employer to spend money is coercion.
In America people are employed at will. No one forces a person to work and no one should coerce anyone to pay money to another.
A Minimum Wage is force. Government want’s to make minimum wages laws voluntary by holding out a punishment unless the minimum wage is paid. That’s clear coercion.
Force is immoral. Minimum wages are immoral too.
What to drive down the unemployment rate? Eliminate the minimum wage and watch employment skyrocket.