Why no death penalty if PAP believes in deterrence?

[winnipegjets]

For killing another driver, Ong was jailed for 15 months and banned from driving for eight years last week for dangerous driving and driving under the influence of drugs.
http://news.asiaone.com/news/singapore/we-thought-we-still-had-time

Wouldn't a death penalty deter from other motorist from reckless driving and driving under influence?

 

[zookeeper]

Wouldn't a death penalty deter from other motorist from reckless driving and driving under influence?

No drugs, no reckless driving.... then what else can the rich people do?