Also note that Orwell's esssays are some of the best examples of clear writing in the English language.
When I was a high school sophmore (in the days before electricity), my English teacher told us that we would learn to write better if we read Orwell because he was a very clear thinker. He believed that clear writing (something in short supply today) was primarily a product of clear thinking (something even more precious today).
He's my second-favorite author of all time (behind Churchill). But you're absolutely correct in that regard; Anyone who reads Orwell always comes away with exactly the idea he intended to convey.
I agree, and very insightful about the dynamics of power.