I think what's really going on is that almost nobody in Singapore has ever had this option before. If you're an elderly individual with a CPF LIFE Escalating Plan that more than covers the lifestyle you desire, and a HDB leasehold (for example) that'll outlast you, you're done. You can live in dignity for the rest of your days, and you're not financially dependent on any children or grandchildren. So what you'd do in the past is hoard some assets (such as a home, small business, or whatever) as a reward for the child or grandchild who kept you afloat financially with an allowance. Your child or grandchild (or plural) was your pension plan. If that child or grandchild abandoned you then you wrote him/her out of your will.
....And sorry, but I think that sad and so unnecessary in most cases. We have a terrific life annuity program now, born in 2009. We can do better. My grandparent wasn't financially dependent on me, he could be generous when it mattered the most (or at all), including the many regular times we enjoyed life together, and whether he left me a bequest or not (he didn't) was immaterial because he already gave me more than I could've ever expected. Isn't that better? I sure think so, but hey, carry on if you think otherwise I guess.