<<Am i the only one here who thinks that EK makes most operational decisions based largely on cost?>>
More than likely.
Fact is, DEC's are nearly ALWAYS the least expensive in the long run, due mainly to training costs.
Is it 'fair' to those (especially co-pilots) already there?
No, not necessarily, but just where is it the regulations/employment contracts does it ever say what is fair...and what is not?
In the case of the 380, I would expect that EK will indeed choose a few of their own, and then mainly hire from outside, as the total flight deck crew numbers will not allow otherwise.
Airlines (and their managements, good or poor) will always make staffing decisions based on what is the most benefical for the company, NOT employees.
Like it or lump it, and I would certainly expect that most at EK will fall into the latter category.
Just the way it is, and not likely to change anytime soon.