Surely any DEC will have the Salary agreed in writing in the offer of Employment from EK and therefore forms part of the contract???
If indeed EK are renaging on the agreed Salary then they are learning fast from SQ cos that is exactly what SQ have done!! Thay have also discontinued the 10% Provident Fund without any consultation and won't even payout the money until one leaves in order to ensure no Pilot's disappear in the Night!!!
The managements of EK and SQ are vying with each other to see who can be the most contemptable. Looks pretty even at present.