Free movement of labour is often described as one of the four fundamental economic freedoms. Putting it into practice is somewhat more difficult.

To make the intentions of this column clear, I am generally in favour of migration. I am a descendant of immigrants and live in a country in which virtually everyone admits to a migration heritage and which has one of the highest proportions of foreign-born in the world. I am also very aware that future migration will dramatically change the country I love, especially by the Asian inflow.

Pundit member Carolyn points out that the number of Kiwis leaving for Australia might not be as catastrophic as some media – and politicians – suggest. A population expert replies to her questions

A reader, Carolyn, writes: