The correct answer to this open question is the following.
The psychological mechanism by which persons interested in power have the opportunity to subvert any revolution is manipulation.
Through manipulation, governments, and especially great leaders could move people to do things never before thought, like start a rebellion, a revolution, or even a war. The best example that comes to my mind is the charismatic personality of the Nazi leader, Adolph Hitler. Hitler moved the masses and used propaganda so effectively that convinced the German people of his strategy.