>link for "Distribution of Household Wealth in the U.S. since 1989"
income =/= wealth
And the counter argument is wealth is different than income the implication is that wealth inequality is 1) lower than income inequality and 2) more important for some unspecified reason.
But if wealth inequality is more extreme then that means 1% control GREATER than 80% of wealth. So point 1 is false. And point 2 is most likely irrelevant because greater concentration likely means whatever harm from one category would track the other category
That's still measuring wealth, not income. The correct statement to draw from the chart is that top 1% by income have nearly as much wealth as the bottom 80%.