If I remember correctly it was produced by Milton Mayer, with a screenplay by Lysander Spooner and starred a B-grade actor named Robert Nozick who plays the protagonist W. L "Bill" Garrison.

Garrison and his band land on a planet that is governed by a kakistocracy of omnicompetent – or so they think – men. The people seem happy and brag to the visitors about their freedom and how they have all kinds of rights that are protected and enumerated by their foundational charter. The visitors discover that the people of the planet are known as the Snacirema and that they are hospitable to strangers, but easily herded into a sort of unanimity of thought. There are a few independent thinkers, but they are derided as "Nockites" or "Remnantists."

After a few days of intermingling, Garrison becomes convinced that all the supposed rights and freedoms the Snacirema brag about are illusory, in fact he becomes convinced that they are slaves.