"Greenspan, 82, acknowledged under questioning that he had made a “mistake” in believing that banks, operating in their own self-interest, would do what was necessary to protect their shareholders and institutions. Greenspan called that “a flaw in the model ... that defines how the world works.”"

https://www.nbcnews.com/id/wbna27335454

Alan Greenspan was part of Rand's inner circle and a believer in her Philosophy of Rational Self-Interest.