Because whenever you have a large group of people, such as the
population of the United States, it self-organizes and develops a mind
of its own with political leaders being very much like fleas on a dog.
That is, the fleas think that they're in control and order the dog,
say, to move to right, and the dog moves to the right of its own free
will, and the fleas all huddle in a meeting afterwards and rejoice that
their commands are being obeyed. So it doesn't matter who is
supposedly in charge - everybody's in charge, and nobody's in charge in
actuality.

Another cybernetic effect is that you could strip away the entire
govenment right down to the dog-catchers and it would spontaneously
reform in time. For all govenment is is the layer of control whch
forms automatically over any set of systems (it's the metasystem). You
have a bunch of cars out there, you will have traffic control after
awhile.

Hope this helps.

- Don