If one has a few billion, I guess the CPF monies is insignificant.
No need to exaggerate.
Some Princeton researchers estimated the “happiness threshold” in the United States not too long ago, and according to their findings it was about US$75,000/year of income in that country. That is, once you get to that level of income an additional dollar of income didn’t make you any happier, on average. Sure, you could buy more things, but as far as happiness, that’s as far as it goes. If you’re going to be any happier, you have to find that greater happiness in other ways than more money.
Some people have figured this out. It’s a concept of “satiation.” I believe I’ve reached that point, and I’m quite fortunate that way. But there are many such people. (“Cowboy millionaires” have, by and large.)
So, what are you going to do with this CPF money if you don’t need it and if it doesn’t bring you any more happiness? If it’s safe and protected, growing very nicely, and could benefit an heir or charitable cause you care about, “let it ride.” Why not? It’s simple, and no, it doesn’t require billions. Not necessarily even one million.
But it’s a moot point anyway, because the government doesn’t allow you to postpone payouts past age 70. Other countries are often the same. [The U.S. has a maximum age of 70 for U.S. Social Security retirement benefit startup and age 70 1/2 for its Traditional 401(k)s and Traditional IRAs, to pick another example. Governments don’t like to keep great deals going “too long.”]