I'd be interested in how the federal minimum wage makes state minimum wages unconstitutional. The federal minimum wage reads that for most people $5.15 is the minimum wage, although agriculture workers and those that rely on tips can be paid less. How is it then unconstitutional for Alaska to make their minimum wage be $7.15 an hour? It's perfectly consistant with the federal law.
Commerce is either interstate/international or intrastate .
The first is the sole purview of the federal Government, and solely regulable by the feds.
The second is the sole purview of the Staes, and is solely regulable by the States.
If we were on crack, we might suppose that the minimum wage was a part of interstate commerce, and thus is only regulable by the feds, and therefore not by the States at all.
Of course, thats ultimately ridiculous since we aren't on crack except in a very few limited circumstances. The minimum wage is imo a positive thing, but I wholly recognise that it has to be passed at the State level under the Constitution.