>> How about V for Vendetta then, the original book had a much clearer idea of anarchy, totalitarianism and the consequences of each than that watered down movie.

This is why Salman Rushdie sold the movie rights to Midnight's Children for only $1. On the Daily Show, he said he wanted to maintain creative input into how the movie was made. I'm sure he gets compensated by being a producer, but it shows how much he was willing to give up in terms of money in exchange for this ability.