Yes skilled people do get paid more and they should, but that hardly says much about the economy in general. Engineers and construction workers are paid well in part because of how profitable those businesses are.
So you DO understand supply and demand. Demand for those with skills is greater and they are paid accordingly. Those without skills are paid less. As gov't dictates a federal minimum for the least skilled, is it not logical they will also want to dictate a maximum for the most skilled? Do we really need federal involvement in our wage scale when states can do the job.
Except that NO ONE is proposing a maximum now are they? That is what matters.
The point you so assiduously avoid is that our federal gov't HAS NO BUSINESS setting the wage scale. Not at the high end and not at the bottom.