As have aristocracies in the past, the American aristocracy has become a caste unto itself, and very much motivated to perpetuate its rule. From the Zman at theburningplatform.com:
There are a variety of ways to hold power. Some are better than others and over the history of man everyone one has been tried with varying degrees of success. By far the most effective way of maintaining power is to get those over whom you hold power to think their interests lie in you remaining in power. If you can get your subjects to think that their very survival depends upon you remaining their ruler, not only will they obey your orders, but they will volunteer to defend your position.
Of course, convincing even a majority of this can be expensive and difficult, so a better way to work this is to convince the people at the top. Every society is hierarchical, so if you get the ruling class to think their interests are your interests, then your interests become their interests. Not only will they defend your position, but they will seek to strengthen it when they can, as it benefits them. With everyone’s interest commingled, opposing the king means threatening the system itself.