Which leaves Prime Minister John Key's reverse choice of the Hawaiian chain, ourselves, the main islands of Fiji and perhaps (if any such spots remain) in the Caribbean.
Oh, plus the Victorian coast and Tasmania.
Not a very big list, is it?
Which is why, a decade or so out from projected major strife, you will find the savvy billionaires already setting up in those places, very much including here.
Russian oligarchs in Northland; Chinese entrepreneurs in and around Auckland; American celebrities through the Southern Lakes; and a bevy of various nationalities with loads of dosh along the Tasman Bay and Marlborough coast. Plus our "own" one percenters like financier Julian Robertson at Cape Kidnappers or film director James Cameron in the Wairarapa.
Any spot, actually, they decide they like, they're taking and re-making to suit themselves. Often spending $50-plus million doing so.
Theoretically there's nothing wrong with that, and many wealthy recent immigrants are investing decent slices of their fortunes in the local and national communities. Good for them.
But others are more reticent and reclusive and it does beg the question: if New Zealand is increasingly seen as the place to build a future while the rest of the world degrades or explodes, then shouldn't we think about imposing an "opportunity cost" for the privilege?
A decent amount, I mean, not the piddling few million someone may or may not actually have to invest if they come here under the rich list rules as they stand. Say, 10 per cent of their wealth.
That's modest in percentage terms, but it's a 100 million out of a billion. Multiply by fifty or a hundred and you accumulate enough to fund some significant infrastructure.
Let's face it, if things go belly-up in a hurry they could lose that overnight; far better it's put to real use while it still can be in the land they've chosen for their "retirement".
How much is a good bolt-hole worth? Tax havens like Jersey have strict rules of residence, and that's only about money; how much more valuable is ensuring your family's survival?
Fair's fair. It's their choice to come here, but it's our land they're colonising. And demand is starting to out-strip supply.
Remember we are at base a low-wage economy in need of a sizeable cash injection.
So pay at the door.
-Bruce Bisset is a freelance writer and poet.