Lol.. this is like predicting when you will be called to heaven
It is the same (or worse) in other countries.
In the US you are forced to contribute to social security, and all of your contributions go straight to the pool from the very start. There is never any account balance. All that you get is some assurance of future payments, and for retirement that starts no earlier than 62. If you die before age 62, all of your contributions over your entire working career can be completely forfeited!
If you choose to start retirement benefits at age 62, your payments will be reduced by 1/3 for the rest of your life. So, at that point you have to predict how long you might live, and decide if it’s worth postponing and getting higher payments. But, the stakes are higher because it is possible that you will never see a single cent.
This same thing can never happen under CPF, either you get payments or your beneficiaries get a bequest. The absolute worst case is that every cent of your RA balance prior to CPF LIFE is distributed to either you and/or your beneficiaries.
There are only 3 factors to consider when trying to determine how long you will live:
1. Genes - how long did your parents and grandparents live? Any family history of health issues?
2. Lifestyle - active or sedentary, BMI, diet and exercise, smoking, drinking, etc.
3. Luck - impossible to predict
So really just 2 favors to consider.