I asked this question in the Wisdom of the Crowd:

Should the Singapore Exchange raise its qualifying criteria for a company to be listed?

Here are the responses:

59 % - Yes. It prevents shady companies from being listed.
18 % - Yes. It will give confidence to investors.
12 % - No. This will discourage companies from listing here.
11 % - No. It should be left to investors to do their own due diligence. 

See the pie chart at: 
http://www.wisdomofthecrowd.sg/chart.aspx?ID=769