Anti-rich resentment is a good contender though. Their brain might explode at some point, when they realise that these limitations only apply to them, who never actually made most of the pollution happen.
Cars have a societal cost that is far greater than the car-related taxes paid by car owners. Aka car owners are subsidized by non car owners. Not saying Singapore has a fair system but people drastically underestimate how expensive cars infrastructure is for society.