You don't stick staff on longhaul work travel (in their own bloody time!) in coach with min. rest and expect them to perform in Sim checks.
Lol... some of you guys need to get out more - like outside the little aviation backwater that is NZ! Many companies do this, with the added excitement of sim sessions that start at 0300 on your body clock. I can remember more than one time when I did six difficult winter sectors, straight into a hire car for a four hour drive to the sim, then six hours rest and up in the middle of the night for a check.
The airlines that punt their crews around in business class could probably be counted on one hand... maybe two.
I'm not saying you are wrong - you are quite right about the way crews SHOULD be treated - but it is increasingly rare these days. Mt Cook are simply following the international trend.