I don't know what the cost of education is at an Indonesian school but it's unlikely to be QR4,000 to QR5,000 a term. QP will pay school fees for staff on married status but only for the school appropriate to your nationality (i.e. if there is an Indonesian school they will pay a large part of it))
School fees tend to reflect the ability of the appropriate nationality to pay.
I agree that the salary is very low considering the high cost of living and accommodation.