I am not sure on the concept of the Devil's Disciples nor even the paranoia concept you are stressing in the Illuminatti, but as for the question, that, I have some things on which to say.
The American government was designed simply, but over time it has become complex and too complex governments do not last very long.
We have indeed lost the freedoms slowly in an encroaching manner, but that is largely due to the fact that all three branches revolve around the making and breaking of laws. It was fine for the first 100 years because there was still expansion and huge cultural reformations, but now what is there left to make laws on?
There are no more huge cultural reformations anymore as there is now a Global culture and, as for laws, well at some point there comes a time when there is nothing left to make laws on so they went naturally to the last refuge of true freedom, our basic freedoms. Today I would say that there is no true freedom as every action and breath is regulated and all these complexities will be our country's downfall.
We are at the same point where Rome began collapsing and the fall was quite swift. The military is sent to far abroad and is straining the economy. The government is a swarm of corruption and out dated personalities. The world is quite tired of our elitism and snobbery.
I had hoped, however faintly, that the change in Presidents would in fact broadcast Obama's message of Change, but well, too little too late comes to mind. Even so Obama will not be able to do much as his inexperience is starting to show. He had woefully underestimated the position he won.
We are screwed America and it would take a lot of serious work and cultural change to save ourselves.