angel6975,

Here are answers to some of your questions:
Q1: "Btw, how much would a person from the west expect?"
A: A WHOLE A LOT more than your offer, at LEAST double! I don't mean to sound racist, I'm only speaking of the reality of the workforce in the region, but don't waste your time comparing your offer to that of someone from the West. If you carry a Western country passport while you're originally from Singapore, then you should expect to be CLOSE (but not equal) to the offer someone from the west is going to get. Now, if you were carrying a Western country passport AND you are originally from the West (i.e. White or light-skinned) THEN you can expected to get the full advantageous treatment someone from the West gets. Again, I REALLY don't want to sound racist, but this is the reality of the market here.

Q2: "And what if it were a senior position?"
A: If it were a senior position AND they still offered you this sum and these allowances, then believe me, it's like a slap in the face. 5,400 QAR is no longer considered money in Qatar... and 2,500 QAR will not allow you to rent a TENT, much less an apartment. The most you'll get with the 2,500 QAR is a room, if you're lucky, to share with a bunch of other people in the same house... very little privacy or indepedence. This offer can't be made to a senior employee unless the company has no respect for that senior.

Finally, Zahid32 put it elequently for you in the 2 lines he wrote... it really sums up all that I've been trying to tell you.

Good luck.