Thanks for the clarification. When you wrote "Milton Friedman's biggest lie" the implication to the reader is that Friedman is deliberately saying something is true when it is not. As the wikipedia article says, Friedman did not say it is recognized that maximizing returns to shareholders as a fiduciary duty simply saying he thought it should be. As a normative theory of business ethics, people can agree or disagree with the idea. (Just as in a different context, if someone argues prisons should focus on rehabilitation and someone disagrees, that doesn't mean the first person lied.)