Quite wrong, I think. If nothing is wrong with your brain's calculator, than the older you get, the more of the culture's resources you control. That's the nature of compound interest.
Having a huge overburden of sufficiently self-absorbed, self-contained old wheezers--as to allow wealth to collect like that, instead of properly passing it on--live 500 or 1000 years will distort the economy beyond belief, and probably beyond remedy. If you want hardy, viable, incredibly well-educated young adults, than your culture's resources should flow into the hands of the young while they can still breed.
I will be buying casino stock, because their slot machine customers are going to be around for a few hundred years longer.
And when do you plan to collect & spend the profits from this venture? See how easy it is to become part of the problem? People who are able to collect, say, 150 years of investment growth will have incredible economic clout compared to people with normal investment frames of reference--such as poor young people just starting out.
As for me, I'm a published author who is right now too busy starting and selling businesses to write. I'd love to have the time to write again.
That's what FR is for. Frustrated essayists. Why not indulge?