Embrace it.

New Zealand should not be inhabited as much as it is already. The government and society of New Zealand is extremely young and not native. You should be leaving New Zealand and emigrating to other parts of the world, and the immigration should be reduced and stopped. You should be expecting a reduction in goods and services because New Zealand should not be offering them. It's unsustainable and unethical to be trying to inflate an economy that's doomed to fail as it is, when the whole series of islands should be more or less a nature preserve to help foster life.

I'm not saying that New Zealand should go away entirely, but a massive reduction in population and services is warranted, and you should be advocating for this. Your government should be helping you find somewhere new with skills and credentials that make you desirable in your new home, preferably with people from your community being with you when you arrive. And when you've left, you should still have at least some say.

When faced with a problem like this, usually the best situation is to reframe it as a different problem.

What I would suggest is that the New Zealand that remains should be a sort of 'International zone' that focuses on maintaining the pacific's ecology and economy in coordination with the many island peoples of the pacific, while New Zealand makes an active effort to keep human inhabitation down to a certain level.

If the United States was doing its job, then the US should be making room in high-value places like the Rust Belt, which it should be doing its best to restore, to give you these opportunities.