People realy misunderstand the Singapore justice system, sentence lengths are incredibly lenient compared to most US states and comparable with most other developed countries. This is due to the small size of the country making incarenation uniquely expensive and unaffrodable.
Singaporean judicial frameworks emphasis Deterrence followed by retributions as the primary purpose of the justice system with rehabilitation being a terirariy concern. The way this is squared is by the cane which provides a method of harsh sentencing without increasing sentence lenghts.
For any non-drug crime, the sentence you would recive in singapore would be a fraction you would get in the US.