Why is it taboo to say congratulations on getting rich in Singapore?

Singaporeans avoid saying "Congratulations on getting rich". They think that the word "getting rich" means "windfall" and "windfall" means ill-gotten gains.

Any country except China. Because of the different social and cultural backgrounds, in their view, making a fortune by windfall is a sign of incompetence. Making a lot of money by skill should have been mine, and no one needs to "congratulate".

Happy new year! (? & gtω& lt； *? )