"If you believe in economic freedom, you see no evil in the GPL. No one is forcing you to use it and no one is forcing you to use software written with it." Bingo--the problem arises when one is coerced into specific actions by government edict. I have always liked the term "free enterprise" FAR better than "capitalism". The very notion of "capitalism" is VERY overly simplistic (as is Communism, Socialism, etc.).
And as my memory serves, the very term Capitalism, was created by Marx...... (how's that for letting the opposition define the debate)