Why Billionaires Have No Right to Their Wealth - by Vince Taylor:

The classic models view output as a function of capital, labor and technical change. There is no room in these models for gigantic, undeserved bonanzas going to the few. It follows logically that those who acquire vast fortunes must have exceptional gifts but when one looks beyond the classical models, it is clear they did not in any sense earn them. They captured for themselves wealth that rightfully belongs to society at large.  They have no inalienable right to keep it. When individuals gain so much wealth that their economic and political power threatens democracy or harms the general well being, society is fully justified for the government to tax all huge fortunes down to the level that society considers acceptable -- because those with large fortunes did not create the wealth they hold.