Edit: Also, income inequality is no big deal if the rich aren't stepping all over the poor. As the article points out, the super-elite in Shanghai haven't stopped the middle class in China from exploding, and average income is growing strongly despite the financial crisis. The super-elite aren't hurting anything.
You can read that book in many ways.
(Actually, sometimes I am forced to read dead trees because there is no alternative.)
You can get a kindle app for Android, iPhone, Mac and Windows for no charge.
But they did actually film it - and it only took them 35 years to get it done.
You can vote for one seat at the lords chamber. The weight of your vote is proportional to the taxes you have paid.
You can vote for one seat at the commons chamber. Everybody's vote weights the same.
The above paragraph suggests that the author is aware of Ayn Rand and disagrees with both her (who was not libertarian) and the libertarians. Then the author goes on to imply that the free market is responsible for the rising income inequality and to put all the rich under the same common denominator, with no regard for the source of their wealth (note how many names are cited and the widely varying reputations of the businessmen in question). Ayn Rand is very explicit on the distinction of gaining wealth through thoughtful and productive effort on the one hand and through special privileges on the other. It is this observation that the author has ignored.
Second, the author concludes that "the lesson of history is that, in the long run, super-elites have two ways to survive: by suppressing dissent or by sharing their wealth", so they must choose one of these options. This message ends an article that would constitute a weak response to Ayn Rand (if the article was meant to be one). It sanctions a systems that says: the rich, no matter how they got to be rich in the first place, should either abuse the rest of the population, as they often did in feudal times, or will have to see their property seized by force, as it is done in socialist and communist countries. Otherwise, they cannot survive. Well, that's a very dangerous proposition for individual rights.