Earlier quoted context omitted.
On some level, though, all of retirement is a little ponzi-like; ultimately you're always relying on the current working population to pay for your retirement, no matter what investments you put into your pension fund. Well, no, not really. You're relying on the fact that you own some assets, which you can sell to someone else who wants to own those assets. That's very much not "ponzi-like".
You can't eat an asset. You can only eat what someone else produces, and then only if you can convince them to give you food in exchange for your asset. This is counterintuitive, but globally saving is not possible, in a financial sense. IIRC from economic models it nets out to investment. Which makes sense. Real world saving is amassing a grain store, or an oil stockpile in a strategic reserve, etc And we can't do v…
Retirement is non-ponzi like because the assets appreciate in value due to increased predicted future earnings. This is totally different from paying out what others pay in.
Assets can appreciate in value and income even without new investment.