The primary reason why people go overseas is there is simply not enough entry level jobs nor progression. Supply of pilots exceeds demand and those leaving NZ are headed where there is grater demand. The shiny jets, money and rapid progression come with the territory that isn't offered in NZ.
In days gone by 2000-3000 hours to get a job in the right hand seat of an EMB110 you have got to be forkin kiddin me.