There's a nice review/reflection here (which I found, as with all that is Good and Wise on the web, via InstaPundit) that makes some good points (including some plot spoilers, so don't read if you haven't seen but plan to see the movie):
"The social experimentation that brought about the Reavers and the rightfully negative commentary on it can be understood as an attack on the belief that social engineering and 'meddlesome' policy can lead to human perfectability--'a world without sin' as the Operative puts it."
It is possible to see a great deal of government today as attempts to engineer us closer to a "world without sin". These attempts tend to be constructed by people who deny the fallen nature of man, which makes their attempts doomed to fail, usually with horrific consequences. One such attempt went down to defeat this weekend in Brazil, again via InstaPundit.