That doesn't mean much. The usual problem is that there are big swathes of the population living in regions without a healthy/diverse/growing economy. (Eg area

That doesn't mean much. The usual problem is that there are big swathes of the population living in regions without a healthy/diverse/growing economy. (Eg areas that are or once were monocultures of one particular sector, and/or are/were based on natural resource extraction. So basically fossil jobs and auto making are the prime examples.) The needed retraining, relocation, and/or regional revitalization is completely non-existent in the Trump era, and it wasn't really effective/serious during the Obama administration either. So, nothing to do with how much a plumber makes in a big city.