The Economist lists Singapore as a hybrid regime with elements of authoritarianism and democracy. It ranks in its democracy index below Malaysia and Indonesia. Thus I do not think it is 'arguably the best functioning democracy in the world'.
It functions well and it is a democracy. I didn't mean to imply it achieved any unusual height of democracy. Rather, it achieves other things very well.
If it's worth saying, but not worth its own post, even in Discussion, it goes here.