This is what I have learned:
Wealth is the first stage, gained for the family legitimately or by less than honorable means.
This wealth can produce an unending source, hidden here and there. Designed to sustain the family generation after generation. This can soon become automatic and boring.
Power is the second stage. Power to control the destines of people and nations. The wealth of course helps bring the power for the family. After awhile even power becomes common place to such a family. They expect others to do as they are told and this even this can become a bore.
Worship is the third phase and the most rewarding for these types. They have become mythical near gods and goddesses in human form and who they control respond in worshipful ways, bowing to the meer mention of there masters name. These are those who have received benefits, gifts, favors and in return think of their benefactors in all but a divine way.
Now as to why you seldom hear of these families. It is because their wealth is defused, old, in countless trusts in many different lands. This tactic makes them much less noticeable especially since they abhor any publicity. Their children are throughly trained in having a low profile. If the rabble rouses, great gifts and benefits are given to quieten the herd and so it does. None of this is new, just perfected by now.
Even if I gave the names, they would win by silence and knowing most humans can't believe. This would cause to much damage to their worldview and safe lives. They have no heart for cattle! My guess should be disturbing, but prove it yourself by observation.
The motivation is to have the world for themselves. I was told simply that the day that these types and their families could live in comfort and safety through a nuclear war, WE WOULD HAVE ONE. The Drones represent their predilection to knowing what is unknown in case it should benefit them and them alone.
I leave it to you to judge by your own experience and observation,
L E V I A T H A N