The correct answer is:
Military-industrial complex.
Explanation:
President Dwight Eisenhower warned the United States in 1961 as part of his last presidential address about the influence of the military-industrial complex (alliance made by the military industry of the government and the defense industry that creates arms, as a two-way benefit, ensuring that the product created will be purchased). The military-industrial complex had developed inevitably during World War II and the Cold War, and had gained a lot of influence in public policy and represented a potential danger to the institutions.