Really? I would think the rich are very much incentivized to fund any research that may slow down their aging (as are the poor, but they don't have enough money

Really? I would think the rich are very much incentivized to fund any research that may slow down their aging (as are the poor, but they don't have enough money). When you have achieved most of the goals in your life, the remaining goal you have is perhaps to elongate that success for however longer you can. For example, several Chinese emperors, starting from the first one, were obsessed with living forever, giving tons of resources and power to "alchemists" who claimed to be able to produce medicine to keep the emperor young.