I should also mention, at least in passing, big businessmen not only had a particularly important effect in pushing through domestic regulation, but they fostered interventionism in foreign policy as well.
Big Business and the Rise of American Statism, Child's speech at first convention of Society for Individual Liberty, held November 15-16, 1969. Reprinted in Liberty Against Power, San Francisco: CA, Fox & Wilkes (1994) p. 36