This is a controversial topic from what I've read.
I'm one of those who find the "85 people = 3.5 billion" simply outrageous.
A homeless man in London or NY lives a 100x better life than millions and millions of people like this:
We, human spicies have the means to avoid this type of thing (or, at least, minimize their effects), but some of us preffer to defend those who have billions than those who have only the air they breathe and the body they carry.
I'm not an hero. I'm not against rich people. I recognize there will always be people with more money. But we should get rid of the poverty. And probably all those billions could do something about it.
I never wanted to be a billionare or a millionare. I think the best society (in the entire planet) would be one where the "poor" would be our high/middle class.
The difference between people "weath" should be a lot smaller.
How many chinese and indian people work for food so a few individuals can increase their wealthy pockets? Is it moral? These are tough questions that can only be answered if we question the fairness of the huge income inequality that reigns in the world.
Another thing: What would be the answer of a 7 or 8yo kid confronted with this question? I
bet it would be simple and morally acurate.
How much does a billionare's life woth? 1000000 poor and sick kids? 1000? 10? 1?
edit: I won't touch the issue of capitalism or corporatism.
edit2: before someone asks me: I'm not wealthy nor rich. And I've given to solidarity causes (Banco Alimentar contra a Fome) and when I do not have money to give, I give my blood.