At the end of the day, if you want to get back to NZ in the next 20? years, and don't want to go right seat on a turboprop, though that is a fun job, then it's this or nothing.
Once upon a time you could amass a small fortune as an expat by the time you were 40 and go home and spend a big $150K on a mansion in Christchurch. Sorry to say things have changed in the industry and the cost of living in NZ. For those of you who haven't been back in a while, winning the $100K Golden Kiwi won't set you up for life.
Supply and demand, this is what they are offering and I'm guessing there are enough homesick kiwi's who miss fishing, extended family and their HQ Holden. They're tired of sand or LVP crap weather 9 months of the year and they're not getting any younger so they'll take it.
If the money's not good enough for you wait another 10 years and see what else pops up back home.