This reminds me of an excellent article in "The Atlantic". "The Birth of a New Aristocracy"[theatlantic.com]

Shocking to read, but not at all a surprise. There would need to be a concerted effort by all governments to crack down on the super rich and not allow them to employ the ruses and expoit the loopholes in the various tax systems around the world. The greed which some of these über wealthy display is grotesque, just how much money they think they need is beyond belief. The “idle rich” is not a title that was dreamt up recently, but it’s been around for a century or so....the difference is that they are getting richer whilst the poor are getting poorer. Governments punish the poor by cutting welfare programmes and reward the rich by cutting taxes....the actual reverse of what is necessary to help redress the wealth disparity. It is no wonder revolutions have happened in the past and maybe we should think carefully about the consequences of not paying heed to the increasing imbalance between the rich and poor in today’s society unless we want history to repeat itself.