Trade deals between countries should have protections for workers, consumers, and the environment built in. Currently this is mostly not the case. And in rare cases when these protection exist, they are usually not enforced.
All trade deals should have promotion of economic and social justice at the core of the agreement. Instead of what we have now, where trade deals exist only to serve the interests of corporate profits, which mostly ends up enriching those who are already super-wealthy.
In other words, trade pacts and organizations should exist to serve human need, not human greed.
That's an anti-capitalist message. In my opinion it's very close to the heart of what Occupy is about. Without that message I'm not sure Occupy would even exist at all.
It's the common interest that allows labor, environment, anti-war/anti-imperialists, and other grass roots activists to come together in a common cause. Occupy is a convergence of anti-capitalist activists, in my opinion. Separately we have suffered decades of defeats because the power of big-money special interests (capitalists) is too strong. But together we stand a chance of being able to win some victories against the big-money special interests.