'Tech Crew' is the term many airlines use to refer to their flight deck crew.
I don't have an answer to the question posed on this thread, but it would make financial sense to have second officers, especially if time to command increases significantly (which it will, see other threads). The big problem is, EK would then have to make the graduating cadets S/O's, just like CX and so on. On numerous occasions, I have heard nationals say that there is just no way that a cadet will be used as an S/O. At some point, the cost pressure may overcome the 'ego' pressure, but I still suspect that is a long way off.