Oh yes, highest concentration of rich of any country is in Singapore. I visited there in March of this year and it is an amazing city-state. 3.5 million citizens + 2 million foreign workers on 2 year work-visa’s. There are no unemployment benefits, not needed I guess, with more jobs than adult citizens. Also no food stamps or other welfare for working age citizens. Combine that with low corporate taxes and industrious people and the results are for all to see.
Singapore is also serious about enforcing their borders despite nearly a 100% employment rate. Repeat violators can get caned before being deported. Serious lifetime scarring on your butt tends to be a very powerful disincentive to not apply for a proper visa.