Business Times and Straits Times had an article a few weeks back regarding this issue.

I can’t find the original article online, but if anyone has a BT subscription could kindly help me find it.

According to the department of statistics, the gross median income by profession are:

First figure is basic and second figure is gross:
1. Managers (including MD and CEO) 6,000 / 6,300
2. Professional (including doctors/lawyers/fund managers) 4,000 / 4,300
3. Associate professional & technicans 2,600 / 2,987
4. Clerical support workers 1,850 / 2,001
5. Service & sales workers 1,320 / 1,788
6. Craftsmen & related trades workers 1,790 / 2,250
7. Plant & machine operators & assemblers 1,380 / 1,896
8. Cleaners, labourers & related workers 850 / 960

MD and CEO topped the pay ranking, with a median gross salary of $14,765 monthly. That is more than what doctors ($10,786) and lawyers ($8,750) …