Earlier quoted context omitted.
The success of Uber in a city is directly proportional to how much taxis suck in that city. So Singapore is one of a few cities where that's the case (NYC also -- Uber doesn't really work there. I was there for 8 days and requesting an Uber as a 10-15 minute wait. You can get into one of a million cabs that go by in that time. I gave up).
Except when it's 4 pm and you want to go to the airport from Manhattan, at which point none of the million cabs are interested in picking you up.
edit: which is exactly why the city rolled out the green cab system, which has inverted limitations on where they can accept street hails