You obviously have no clue how MOM data is obtained. MOM aggregates a wide spectrum of companies and industries and does not go only for respectable companies like you asserted, that would defeat the whole point of the exercise - they are supposed to provide nationwide pay trends, not "respectable companies" pay trends. Contrary to your claim, HRC data is the one that only has "respectable companies" particpate because their high consulting fee acts as a natural barrier to smaller companies.
MOM obtains its data primarily from 3 sources - IRAS, DOS & random sampling. IRAS & DOS provides tom MOM scrambled and anoynomous data points that provide only age, salary and job title. These job titles are reflected in IR8A & submitted by the admin department of each company, they are likely going to be business titles as employees who have interacted with various government agencies such as ICA, MOM throughout the year would have inputed their external title instead of their internal title.
Random sampling by MOM consist of them mailing out survey forms sometimes followed by focus group to random companies and basically ask their admin to self decalre. Anything goes & there is no verification done by MOM on whether the titles reflect their jobs. I did one of those before and I remembered putting myself as Sales Director with a pay of 4.7k because that was my title. My boss was listed as Managing Director, pay 6k. It was a SME & there is no such thing as fake title or real title.
Is MOM data useful as a proxy for the average pay of various jobs in Singapore? I would say yes due to their large sample size & exclusive access to tax filings that covers a wide range of companies & industries.
Is it useful to assess the max pay ceiling of a high performing farmer in pte sector vs gov sector? No, it will severly understate pte sector senior management pay due to the real CEO/COO/CFO/Dept Directors being dragged down by the large number of SME managers with fancy titles.
Just take a step back & look at facts and try to remove emotions because of your personal pay experience or the small sample of friends around you:
Government (High performing farmer)
Salary ceiling at MX9 scale high end of 15k (usually called Director or Senior Director) <-- I think this is public enough and everyone will agree.
Private (High performing farmer)
A few good sources available to estimate earnings potential. Let's start with this report which you yourself shared in another thread just a while ago
http://www.robertwalters.com.sg/file...urvey-2012.pdf
Lets pick a random page say page 3 "Accounting & Finance":
Base on the table, a 15k salary (ie 180k p.a.) represents the following jobs:
Tax Manager, Treasury Manager, Commercial Manager, FC or FD for a SME
Any of them sound like senior managerial level to you? Are such jobs going to be the end point of a high performing farmer in pte sector? Extremely unlikely. So what does Robert Walters have to say about real senior managerial jobs with "respectable companies"?
CFO: 250 - 450k Pg3
Banking VP for IB: 300 - 430k Pg5
Banking VP for BO roles: 160 - 350k+ Pg10
HRBP: 200 - 400k Pg17
CTO: 320 - 400k Pg20
Legal for IB: 180 - 400k Pg31
Sales & Marketing GM: 200 - 300k+ Pg25
Head of Global Sourcing: 250 - 300k+ Pg31
Regional Prcourement Director: 200 - 300k Pg31
Supply Chain Director: 200 - 300k Pg31
Another source is to look at senior manager pay in local listed companies. Their pay can be found at the discolsure section of all annual reports.
Company Disclosure & Information | SGX
Last I checked most were ranged from 500k - 1M, which is way above what a high performing farmer can ever make in gov jobs.
At the risk of sounding like a broken record, I am not saying such pay is typical of the pte sector, I am just answering TS original question that if you think you are good enough, have the drive to move up corporate ladder and money is very important to you, pte sector will have far greater potential rewards that joining the public sector. If he wants work life balance, cruise along & retire at jnr manager level, public sector would be more appropriate because of security & stability.