Clark, saying socialism is evil for those reasons is like saying cancer is bad because it makes you feel bad. You have to some deeper arguments.
And yes, economic freedom is a concept. I call it the golden rule-he who has got the gold makes the rules. It's been like that since the dawn of civilization and will remain that way in some manner under communism or capitalism.
I suppose it depends on what you mean by 'economic freedom,' but I took Clark's interpretation to be that deregulation and free market capitalism is a protection of personal liberties.