N1 Vibes, you are counting young William Gates down a bit. According to the current list of Forbes World's billionaires, Billy has a net worth of some $USD56 Billion, yes, that's Fifty Six! So even if he really did divest himself honourably of 80% of his lot, it would still leave some 11 Billion dollars, and the prospect probably, of never having to pay tax again.
Amongst my definitions of greed, is when my trainee in the tower is doing ground control, the frequency is very busy, a B747 has pushed back from bay W61 and is taking a bit longer than normal to be on his way, and some guy on W63 who is blocked starts to bleat "How much longer are we going to be delayed?". In the words of the spelling police, "how the f**k would I know!". Actually, on re-reading V-cantare's last post, maybe V-c's references to childish fears could throw some light on the subject.
Apart from that, an interesting thread with some nice points of view.