For me - Safety and stability.

Just cross the causeway and you will be in wild-wild west, atleast in some parts of the next door country .. Robberies, hijacking and kidnapping are normal news (I didnt say regular news .. ) and even 7-11 has armed guards and jewellery shops and banks have atleast 3 or 4 security with Shot gun and still they get robbed.

It will be abnormal to see more than one or two security in Singapore with anything more than revolvers .. (They do make them - do they ???)

Well, it is expensive, and if you are law abiding and not into wild stuff, welcome ..

For your info, if you consume drugs in say Indonesia, and enter singapore and get picked up for random test and drugs are detected, you will be charged for 'consumption' of drugs regardless where you did it ..

Cheers