This document discusses how iron triangles warp government policymaking. An iron triangle is a mutually reinforcing relationship between a government agency, key congressional committees that oversee the agency, and private industries regulated by that agency. This creates powerful lobbying groups that prioritize their own interests over the public interest. As an example, it outlines the "defense iron triangle" relationship between weapons manufacturers, congressional defense committees, and the Pentagon in pushing for increased military spending against the wishes of most Americans.