Always fascinated to hear people proclaim that emigrating will solve their problems on hand...
As you get older you probably want to experience more nature and get away from the hectic city life. New megamalls no longer excite you, touristy places such as Gardens by the Bay and Universal Studios bore you, old places of heritage get demolished and whatever's left of your memories get washed away.
In Singapore's case it's even worse with massive overpopulation. That is a problem that can only be solved by getting out of Singapore.
At least in those target destinations for emigration, you probably won't find old folks picking cardboard boxes for a living.
The only problem I have with Australia is its topsy-turvy climate. Christmas time is hot, mid-year is freezing.