That's exactly how I teach it. Yes Orwell was a socialist who thought the USSR just did it wrong. But socialism/communism can never be done right, It presupposes that mankind is generous and selfless, but human nature is, at its core, selfish. Someone has to decide what everyone's "ability" is and then what everyon's "need" is. The decider has all the power and the people have none. It cannot help but become a tyrannical system. In my class we discuss this at length.