Singapore is a weird place. During the flight, the stewardesses walked around and handed everybody something - I was expecting a wet towel, but in fact it was a card in multiple languages which says "If you are about to bring any amount of drugs into the country, you are going to be executed." Lovely first impression to set the tone. Other than the omnipresent paranoia, the thing that struck me as the most bizarre is…
There are many dystopias, but few of them are anything but. Nobody moves to North Korea, and the dystopian aspects of other less thoroughly awful places are things everyone complains about and few want to copy.
Singapore is scary because it's a dystopia with many desirable characteristics. It's a dystopia with curb appeal, one that could be sold to people.
The thing about a deal with the devil is that it works. The devil pays out. It only costs you your soul.
As for the absurdly low fertility rate: many creatures refuse to reproduce in zoos. Singapore is a zoo for homo sapiens, a safe environment optimized for every textbook metric of health and built on totalitarianism "with a velvet glove."
As William Gibson summed the place up: "smile or die."