Econ101.... precisely. CC morale is already extremely low, this is not going to help matters.
The Purser on A380 is already part of the J/C service, and all hands are needed on deck just to get the service done (let alone to the pretty impossible standards EK set) having them take on extra responsibility is going to add even more pressure.
Be sure to highlight the extra time that will be needed when operating with less crew for security checks. They are already very rushed; some crew will be required to double up their areas and some need 20-25 minutes minimum if they are to be done correctly. Already a sore point, this will get worse.