[sliverstorm]

That might seem rational, until you ask how far away effective life extension technologies might be. If you are a 75-year-old billionaire, those technologies would have to be really close over the horizon. So it probably looks like a non-option to many.

[xenophanes]

If they care about their kids, that's plenty of reason to fund SENS!

[sliverstorm]

My parent was not arguing they should be funding SENS to do good. My parent's premise was, why are these people not acting selfishly? Further, that funding SENS would be the most rational selfish choice.

Funding SENS for the sake of your children is not selfish, so it's irrelevant to the question of why are billionaires not investing in SENS to extend their own lives, as the rational selfish choice

[xenophanes]

If you care about your children, then hugely benefitting them is both selfish (changes the world in a way you personally prefer) and rational. Whatever the OP meant I think it's important.