[lemmonii]

>I'm very sceptical about the claim that the incentive to earn staggering amounts of money goes away if your great-great-grandchildren cannot profit from it.

I'ts not that simple, we are talking about evolutionary timescales here. It's very easy to see that if we live in a universe where accumulating wealth will not benefit your descendants, then accumulating wealth is an energy and time sink which will be selected against.

As for the second point i have no idea what Bezoz's motivations are.