"Certainly there are reasons for concern if lower-income Americans aren't able to save or acquire sufficient capital to pursue innovative ideas, or to see their children attend decent schools. They will suffer, and the country will lose out on significant intellectual capital and growth opportunities. But this should not be confused with inequality."

These things that are commonly understood to literally define the word inequality and are direct symptoms of it, yes those actually have nothing to do with inequality. Trust me, I own a dictionary. Don't look it up.