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>> cbs sports thanks you for s s s s s s s s so far, but we found many may

it can do all kinds of things. >> rose: there are others, and people that i know, say, "i want to give it to my children. that's what i want to do." what's wrong with that? >> buffett: i don't really think that, as a society, we want to confer blessings on generation after generation who contribute nothing to society, simply because somebody in the far distant past happened to amass a great sum of wealth. >> rose: so far, 115 billionaires have bought buffett's argument and signed the giving pledge. ages range from 27 to 98.

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rich have been getting so much richer. tech innovations and rising global markets have produced vast fortunes not seen since the industrial revolution. so what does warren buffett say to convince today's billionaires to give their fortunes away? >> buffett: incremental wealth, adding to the wealth they have now, has no real utility to but that wealth has incredible utility to other people. it can educate children, it can vaccinate children. it can do all kinds of things.

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s s s s s s s s so far, but we found many may never get on board. >> come on in out of the rain. hello, mr. hank. how are you doing? >> pelley: for a fortunate few, there is the health wagon. >> can you breathe for me? >> pelley: who are these people who come into the van? >> they are people that are in deerate need. they're train wrecks." >> rose: billionaires don't usually like to talk about their wealth, but this group has.