Chryse.
I suspect that the offer may be a contract with Silk and the salary is on national terms. This means that there are no extras paid as one would expect on an expatriat contract.
Permanent employment would only be offered to a National Singaporean, I believe.
If this is the case, you have no job protection.
A national F/O salary would make life very difficult indeed in Singapore.
Do the sums but include schooling, transport, medical and life insurance as well as provision for retirement.
You will be in the red .
You have to ask yourself why would SIA have two subsidaries flying the same aircraft to many of the same destinations.
I suspect that only one will survive and Silk has a much higher cost base than Tiger ( Assuming Tiger can attract enough crew with the low salary being offered).
Further with Value Air and the joint Qantas/Tamsek also flying 320s and Air Asia in the area, are there enough pooches to screw?