"More than fifty years ago the J.P. Morgan firm decided to infiltrate the Left-wing political movements in the United States. This was relatively easy to do, since these groups were starved for funds and eager for a voice to reach the people. Wall Street supplied both. The purpose was not to destroy ... or take over but was really threefold: (1) to keep informed about the thinking of Left-wing or liberal groups; (2) to provide them with a mouthpiece so that they could "blow off steam," and (3) to have a final veto on their publicity and possibly on their actions, if they ever went "radical".
Carroll Quigley in his book "Tragedy and Hope"