Gary Galles writes in today’s Mises Daily:
Consider an analogy. If the price of ice cream was pushed up, earnings of ice cream producers might go up or down, depending on how much less was bought as a result. But producers of frozen yogurt, a substitute for ice cream, will definitely benefit, because a higher price of ice cream will increase demand for frozen yogurt, clearly benefiting its producers.
Similarly, increasing the minimum wage will raise the cost of hiring low-wage workers. And while it might actually hurt low-wage workers, it will help each substitute for low-wage labor by increasing its demand. Thus, the narrow self-interest of those offering substitutes for low-skill labor, rather than compassion for the working poor, may best explain support for higher minimum wages.
Unions top that list. A higher minimum wage increases the demand for union workers by reducing competition from lower-skilled workers. For instance, if the minimum wage was $8 and the union wage was $40, employers give up 5 hours of low-skilled work for every union worker-hour utilized. But increasing the minimum to $10 means employers give up 4 hours of low-skilled work for every union worker hour.