Socialism, the labour movement, and communism all come from the same place.

It's funny, you're arguing for progressive taxation, but you don't understand the history behind labour movements, equal rights, welfare, socialism, etc... Or why communism is relevant in a discussion about rational choice, inequality and perceived fairness.

I do get it though - Americans have been taught to hate communism, and thus have purged an entire century of socialist philosophy from their collective thoughts.