Wealth accumulation and income are different things. The gini coefficient studies show that the supposed widening income gap is mainly due to households becoming increasingly two-income and multi-income. The study is done using IRS data, and then cherry-picked to produce the result desired. Do the same analysis using individual income and there is no widening gap.
So Mother Jones notwithstanding, Jack, I don't think you have successfully rebutted rosayn3's assertion.