Bosco Kor wrote this

There are many advantages of putting CCT surveillance, like what Commissioner Ray Kelly from NYPD said in an interview that if people saw a sign on the camera that is from the police department it will not only prevent people from committing robbery during the night when there is very little human traffic but also it helps to lower the rate of terrorist attack as it would be seen by the police and would be easily captured. These cameras are also effective when needed in an investigation in tracking down the suspect, it was used in the latest summer subway bombing. The cameras also can be used during riots to keep the rioters under control and also during an assassination of a political figure police could use these cameras to find out what gun was used and where was it shot from, with all these details the culprit would be easier to be captured.

Putting CCT surveillance is a double-edge sword, there are also many disadvantages walking down the street seeing all those cameras could really scare someone with so many eyes looking at them. If Singapore ever wanted to install these many cameras they would need to consider the budget of the cameras if it was on 24/7 and the installation, it would cost a bomb. Also Singapore has to consider the manpower which would operate these cameras with so many cameras it will not be an easy job. FInally there will also not be any privacy, without privacy a typical Singaporean would write in to complain about the cameras and the company will need to get ready for lots of letters. 

Well with those cameras in Chicago, the crime rate dropped by 16% if Singapore wants to put all these cameras its not up to us to decide as they would need to consider all the disadvantages and see if it is worth the money to install the cameras.

Well if the cameras are installed for the sake of the people's safety, i do not think people would mind if their privacy was taken away from them. Many would rather be safe than have privacy.