According to that news of yours, the RSS payout was till 128 years old because of additional voluntary RA top-up!
Here, we are talking about default CPF RSS payout without additional voluntary RA top-up, which is supposed to be 20 years only starting from 65 years old!
I am able to just do a simple calculation to prove that the RSS story given about the additional 2% and 1% interest can extend payout by 10 years is just fictional:
Assume you have $181,000 at age 55.
Then, you would have $281,702 at age 65.
If your RA gets paid 4% p.a. and to be paid out in 20 years, your monthly payout will be = $1707 p.m. (NOTE: This is so much higher than CPF Life Basic and CPF Life Standard!!!)
Now, we were then told that you will get additional 2% on first $30k and 1% on next $30k, so over the years, you get additional = $81,184 at end of 20 years period.
Number of Years your payout can get extended = $81,184 / $1707 / 12 = 3.96 years!
Ok,
so my calculations show that the additional interest can only extend payout by about 4 years (and not 10 years as claimed)!