I think this article about rich people worrying about the poor rising up to overthrow them is just the fantasy of the leftist, Communist, media. Most of the income equality stuff is just looking at what has always been and making it a big deal.
"Poor" people in America have running water, flush toilets, cable TV, flat sceen TVs, cars, electricity, health care, Obama phones, $200 sneakers, free education, etc. Things the middle class don't have in most of the world. Rich people have always had multiple homes, etc all over the world. There is always the possibility of war, earthquake, famine, flood, revolution.
The rioting in Fergeson was nothing; it was a local problem, magnified by media hype. A few hundred people converted by a media that made them into a massive protest. 300 people protested Ferguson in New York City and the media acted like they paralyzed the city. 250,000 protested abortion in Washington DC this month and it got ZERO coverage, because the media favors abortion There is nothing wrong with anyone having a back up plan, but don't move into the bunker in the forest just yet; that's the view from the Hysterical Right Wing.