Think about it, why would billionaires spend billions of dollars to donate to charities, if they didn't care? The text says, "Gates and his wife, Melina, 'couldn't escape the brutal conclusion that- in our world today- some lives are seen as worth saving and others are not.'" They gave the kids in other countries over 30 billion dollars for their disease called rotavirus. I do not think that they did this to get their own publicity benefit. They donated this much, because they actually care and want to make a difference. I do not think that they think of it as a moral due, I think they just did it out of the kindness of their heart's.