I think there's a lot missing from those articles that is very well summarized by other bloggers I like.
Will Wilkinson, a year ago, had a great piece @ CATO unbound reminding us all that consumption inequality matters more than income inequality in 99% of the cases. And consumption inequality is FAR lower than income inequality.
Tino Sanandaji has had a running series (which he summarized and linked here) on how the most recent book on income inequality is massively intellectually dishonest.
If you have any interest in inequality, what it means and what it doesn't...I'd read Cowen, Wilkinson, and Sanandaji. Borders is ok as well.