Emphasis on skilled. Most Americans make less, adjusted for inflation, than they did 40 years ago, they work longer hours, report more stress and are more productive (not necessarily by choice). The average American worker got shafted. Oh, and the American healthcare system costs people twice as much than average developed countries but with worse outcomes. Single-payer would save people money because of the collective negotiating leverage to push back against $100 insulin, $350 Epipens and $20 acetaminophen.

Furthermore, the US labor force participation rate never gets measured honestly or discussed because it's crazy.. there are untold millions and millions of men and women who have given up looking work. (Idle, disenfranchised people who don't have a future or families is a recipe for revolution, drug abuse and mass shootings.) Also, with automation, outsourcing and increased net population, there aren't as many good jobs as there were 40 years ago and there too many people for regular, less-skilled jobs.

And unskilled workers earn less. So what?

Well, that's highly dependendent on what country in Europe you compare it to, as it can go both ways...

They also have a lot more student loans. Doctors graduate with $300k+ in student debt.