I’ve always hated this leftist meme about “the poor are getting poorer”. On what planet do these people live? We have the richest “poor” in the world. Where else do the poor have flat screen TVs, 2 cars, houses, free medical care, free food, and morbid obesity?
What you say is true but I think the other part of the meme that must be attacked is their assumption that more government will compress the income distribution or that the market is the reason for the disparity.
I propose it is the coercion of government to exclude competition that worsens this.