The courts are ridiculously lenient when dealing with sinkies too. Take the "boomz" girl as an example... she committed credit card fraud on more than 60 occasions. She should have rotted in jail for at least a year. Instead, she got 24 months of "supervised probation" whatever that means.
http://news.asiaone.com/News/AsiaOne+News/Crime/Story/A1Story20090924-169805.html
Upon reading this report, I could then draw one or both of the following conclusions
1. The courts are sexist as they are more lenient towards pretty young girls.
2. They favour singaporeans because foreigners who commit the same crime are invariably jailed.
However, both my claims can be deemed baseless unless I can show a trend based on a large enough sample size. Otherwise, my conclusions are just my opinion.