Who warned of the dangers of the military-industrial complex?

Major General Smedley Butler - Author of the book "War is a Racket" "WAR is a racket. It always has been. A few profit and the many pay. But there is a way to stop it. You can't end it by disarmament conferences. You can't eliminate it by peace parleys at Geneva. Well-meaning but impractical groups can't wipe it out by resolutions. It can be smashed effectively only by taking the profit out of war." -- Major General Smedley Butler, USMC - 1935 General Dwight David Eisenhower In his Farewell Address to the Nation on January 17, 1961, President Eisenhower said, "In the councils of government, we must guard against the acquisition of unwarranted influence, whether sought or unsought, by the military-industrial complex. The potential for the disastrous rise of misplaced power exists and will persist. We must never let the weight of this combination endanger our liberties or democratic processes. We should take nothing for granted. Only an alert and knowledgeable citizenry can compel the proper meshing of the huge industrial and military machinery of defense with our peaceful methods and goals, so that security and liberty may prosper together."

*** Comments that do not answer the question were moved to the discussion area. General Butler and President Eisenhower warned us about the military-industrial complex, but it wasn't the root of the economic crisis of 2008. The root of the economic crisis of 2008 was an unregulated market in complex derivative securities.