The key insight, I think - and this fact is clear the minute one visits an Occupy tent city (I've visited four) - is that the protests are not just about income inequality. They're thoroughly subversive. They're anti-middle class - not in the economic sense, but in the cultural sense. They haven't taken part in normal political processes because they reject those processes wholesale - that is, they oppose republicanism, whereby elected representatives determine policy within a defined sphere of activity, and seek to replace it with direct democracy, which is glorified mob rule and is antithetical to the constitutional order.
In any case, it's an interesting look at a very radical - but enduring, if never overly popular - political theory.