I'm quite sure her form of 'retirement' is not want you or most Sinkies are looking for.
She is single and has a PHD in Chinese. Worked for NTU as an associate professor in 2000. Retired in 2007. Never had to touch her NTU salary as she is working part time at SIM and also had assignments in translations. Inherited a HDB flat from her parents. Claimed to have a few land titles in US, Canada, Malaysia and had other investments like shares, funds and FX along the way. Biggest investments is her insurance policies, which she has 7. Now involved in the World Red Swastika's missions, moral education, meditation etc. Her biggest spending is her Burberry bag which cost a few hundred dolllars and she travel by MRT/Bus.
Basically, you are looking at someone who has been putting all her 9 years' salaries into buying long term investments - insurance, properties and dabble in stocks/funds/fx along the way so that she can work full time as a social worker/educator without having to worry about finances. She spends her time and money now on missions and charities.
I really like what she said when asked about her worst investment to date:
"In a deeper sense, the worst investment is the time and energy lost in helping bosses to produce their report cards. Time is not money, but my life"