How so? As it is the only people who's standard of living has been rising in the past 30 years has been those at the top while the middle class etc. continue to lose ground.
That is true in the US, but worldwide, the drop in poverty has been immense over the past few decades. In 1966, half of the world lived in extreme poverty. As of 2017, that number is now 9%. 9%!
This does not remove the real problems we have in the states regarding wealth distribution. But globally, things are pretty amazing compared to how they've been, even within a single lifetime.