The insanity of America's rich/poor divide

There's an article in The Guardian with the headline: The Decline and Fall of the Middle Class. Here's an excerpt:

[S]o staggeringly unbalanced has America become that the richest 400 American families have the same net worth as the bottom 50% of the nation.

When are Americans going to wake up? This is not okay and it should cause people to riot in the streets. Funny how that's not happening, huh? The media writes the narrative and the people watch their TV screens and chew their cud. Nothing happening here; move along. Sigh.