Main question: In an environment of "almost insane greed", how do you ethically and morally prepare to share massive wealth?
No, no , no
Who forces you to live in the midst of enormous greed?
What can you do (as I can guess you have this problem;)
1. You are going to Africa or countries that really have a situation. You organize a team that checks where and how you can do. A non-profit team. You do not help beggars / You help those who really need it / You help to reach a certain stage
2. You give people in Africa a fishing rod instead of a fish. You build, create jobs, schools.
3. You are a happy man
End of story
and btw
Africa is now as it was in 2000 - 2005 in Europe (Internet Age).
So the ideal time for business is also there.