If you look for perfection, the answer to your questions is no where on this earth. Many Western nations kill people without court. A few months ago secret Brittish police end an innocent South American by misidentifying him as a person. Americans also were willing to shoot and kill without court. A few weeks ago U.S. air marshalls fired several shots and end a mentally illed pbuttenger. Last week, New Orleans police fired several shots and end a mentally illed black man. Did anyone say anything against any U.S. leaders for these killings? Had police of any Asian nations (Singapore, Vietnam, China) done these acts we would hear a lot of condemnations. So why not UK or U.S.A.? The Amesty International and Amer Civil Liberties Union for the past few years have accused the U.S. of human right violations, secret prisons, torture, and secret wiretap. They even acused the U.S. of following tactics of Stalin and Vietcong.
A few hundred years ago, the Brittish forces won the opium war against China and forced China to alllow free importation of opium to contagion the Chinese. For over 200 years, the new freedom of drugs end millions of Chinese addicts and destroyed millions Chinese families. Since most Singaporians are Chinese, they remembered well that they were victims of drugs in the past and now they have no mercy on drug dealers. It's understandable.