The trouble is not that inequality exists -- I think, that some form is necessary in our world -- but that the inequality is increasing in a rapid rate and that in the current state of our society, not achievements where the society benefits are rewarded by the system, but rather achievements where society looses (e.g. speculations, pure possession of wealth, investing -- whatever frivolous it might be, omitting taxes by using legal holes and off-shore trickery, ....)

Even Buffett spoke out, that his class wins, but it should not (for the good of society). And he said, that something is wrong, when his secretary has to pay a much higher tax-rate as himself.