I've just concluded reading a book by Jon Birger called Dateonomics and it has quite a lot of insights on the effects of gender ratios of personal finance.
The book tries to examine the effects of a lack of a eligible males in US cities like Manhattan which I think can be translated into the situation in Singapore.
Almost all substantial societal progress was backed by population demographic which assumes that the number of men exceeds the number of women. In countries where there is a serious lack of women, men are forced to work hard to accumulate wealth so as to be able to score themselves a spouse. This is part of the reason why China is experiencing such a high GDP growth. Chinese men need to signal to their women that they are the alpha worth settling down with.
Where the demographics are skewed in the opposite direction, ......