The people I know who moved there are high-earners who lived in New York City.
There's no comparison.
Singapore is the world’s most expensive city, and one of the reasons is the tax structure and regulatory environment. You can’t even own a car more than ten years old and sin taxes are outrageous - for example, the tax on a single liter of alcohol is $65US and a the tax on a pack of cigarettes is almost $10US.