This comes off as fear mongering. Is this even true? If we look at net migration its basically a flat line bouncing between 0-100k with very few dips below that line. There is no great exodus.

Yes kiwis are going overseas as they always have. Its always been a thing to leave uni and go to the UK or Japan or Canada. But people will always want to live in nz, its a beautiful country, its safe, its got a relaxed and stable work culture.