For goodness sake, we have a number of recent case studies that tell us what will happen here...look at Pac Blue and Jetconnect. Both started out paying similar salaries to those stated here, both ended up in dire straits with poor pilot retention. Both ended up unionised and together the pilots negotiated improved salaries and conditions (well I believe Pac Blue are in the process)
Jetstar NZ will be similar......mark my words. It just takes a bit of time and a lot of bloody hard work.