Absolutely nothing to justify the taxpayer expense of the expensive white elephants?
They were justified by having control of New Zealand skies. A nation that doesn't possess air superiority in its own skies cannot control its coastline either. Give up defending your skies and the surrounding sea and its just a matter of time before your natural resources are plundered by foreign interests while New Zealand looks on helplessly.
Nothing new. Look what happened to the Maoris...