and I thought the whole concept of LLC was to have low overheads
No, part of the original LCC model (Southwest, easyJet, Ryanair) was to pay staff well, in order to attract and retain them, but to keep structures simple (such as paying allowences rather than actually supplying accomodation).
Southwest have some of the best paid pilots in the world.
FlyDubai are going to require a shed-load of experienced, type rated pilots. Why wouldn't they pay what was required to get them?
After all, EK has obviously paid enough to attract and retain you....