(This is an old post that never really developed. I might list the overlapping members some day.)
Generally I don't give much credence to conspiracy theories, mostly because they require far more competency than any group of humans could possibly achieve. Still, sometimes things really do look a bit fishy.
Consider this list.
Now consider this list.
And this list
And this list.
And, finally, this list.
I don't think there is some secret conspiracy going on here; the omnipresence of well known names is quite visible, if not exactly posted on a billboard next to I-95. But the small size of the leadership class is part of the reason that policy so rarely works in the public interest.