It is also worth noting that the results of those revolutions are often worse for both the rich and the poor. There's a long list of countries that have destroyed productive but unequal economies and replace them with those that are worse, and usually unequal but on a different axis.

People like to talk about the French Revolution with Eat the Rich slogans, and forget that it left everyone worse off, led to dictatorship, and eventually everyone coming back around to realizing the old system wasn't so bad.