Rhetoric is agitprop, but a large demographic is immune to that these days. Using facts, logic, and rigorous statistical methods gets more cred these days.
Hayek's
Road to Serfdom and
Popper's The Open Society and it's Enemies are widely available since a long time. If what you are saying is true, then why are we still moving from an opportunity society to a neofeudal society? If what you are saying is true, why do people still believe a command economy like Zeitgeist proposes is the solution?
It is very simple: Economic freedom is at the base of all liberty. It is the freedom to create and trade the fruit of your labor. If you do not have that freedom you are a slave. It does not matter if Monsanto is taking that freedom from farmers, using IP and state bureaucracy or if Zeitgeist is taking that freedom away from farmers, using socialist ideology and state bureaucracy. Dito for everybody else.
If what you say is true, why isn't that understood?