I'm not surprised. Back in Aug'06, I wrote a post titled Quis custodiet ipsos custodies? - Privacy in a Police State. I'm bringing this up 'cos Privacy International has released a study today in which Singapore is ranked one of the world's leading surveillance societies.
Known as the Privacy and Human Rights Global Study, Singapore fares badly in practically every category: Constitutional protection; statutory protection; privacy enforcement, visual surveillance, etc, etc. Its overall score is one of the worst at 1.4 which is considered an "endemic surveillance society".
You can view the full results in this ratings table. And read the country report on Singapore from page 44. Both documents are in PDF.