> Interesting that the author of this piece comes from New Zealand, because NZ is the country that often springs to mind when I think of a nation that might could change dramatically with open borders.

You might want to do some research about New Zealand's current housing crisis and other socio-economic issues (such as Māori being significantly over-represented in poverty statistics) before unilaterally advocating a country that you admit you have never been to and know nothing about (other than its size and population) open its borders because you won't have to deal with the consequences.