Rich or poor, we all get old and die in the same way
I don't think many words can be said on this subject.
Today we are, tomorrow we leave. Only the moment make the difference for now. But after a while - we are all subject to the same laws: aging and death.
Therefore (I think) some people do it all for the present, living moment (animalistic way), others hope for a life beyond death, others .... who knows.
But certainly proven for thousands of years: today we live, we die tomorrow - not good!