It's a combination of political slogans/rallying cries and observations about wealth distribution problems in general. The former will always be wider than they ought to be, the latter can't exclude the "good guys" from the conversation entirely, because they have benefited to some degree from the broken system, even if they don't intend to perpetuate it.

But the name is "Occupy Wall Street". They know who their opponents are. They know who screwed with their mortgages and retirements. They know who paid off the politicians. They're out there with MacBooks and iPhones, tweeting and facebook-ing. Silicon Valley isn't their problem, and they know it.

(Edit: They're not even hammering Wal-Mart, and it'd be so easy. I think that says something.)