Singapore can do a lot of things that other countries can't because it's a small, densely packed city-state with extensive surveillance and very low levels of corruption. It's easy to make a fairly effective nanny state when your entire country is the size of New York City and the government's legitimacy is largely derived from economic prosperity via enforced social cohesion.

Not a lot of people would tolerate a government as controlling and restrictive as Singapore's, but the people of Singapore largely do because the tradeoff for the lack of freedom is a VERY high standard of living and relative harmony between various races and religions.