At first. See Peter F Hamilton's excellent Commonwealth Saga for a society where in 200-300 years the unfathomably rich are the super-rich of today, but where

At first. See Peter F Hamilton's excellent Commonwealth Saga for a society where in 200-300 years the unfathomably rich are the super-rich of today, but where rejuvenation is so well-developed that it's government-provided for everyone, and immortality is just expected. The super-expensive start of the technology is covered in the short and less good Misspent Youth, which isn't really part of the main story. They get around the population explosion problem with portals to other habitable planets. https://en.wikipedia.org/wiki/Peter_F._Hamilton_bibliography https://en.wikipedia.org/wiki/Peter_F._Hamilton_bibliography