That's an indicator of wealth inequality, no? The top 50% are paying less as a % of their income, but because their income is rising faster (relative to the bot

That's an indicator of wealth inequality, no? The top 50% are paying less as a % of their income, but because their income is rising faster (relative to the bottom 50%) than their total tax rate is falling, they end up paying more in total, mainly because the bottom 50% have less to give.