why BMWs are on average 4 times more expensive in Singapour than US? Low taxes at work? Need to use public transportation because cars ownership is taxed to hell and back? How came person using bus and not owning a car is considered to have better standard of living?

The few occasions you need a car, you can get a cab. Generally people don't need cars to get around if you think about it.

Because taxis are cheap and taxing private cars so much cuts down the traffic jams immensely.

I'm happier taking the bus in Singapore than I would owning a car in half on the United States.

I'm happier in the US where the dream of owning BMW or Porsche may easily become reality vs. just stay a dream forever.

because the metro is way faster. and Taxis in Singapore are really inexpensive (at least compared to the US or Europe).

I honestly don't know why you'd want to have a car there given the crazy costs.