I have a very simple approach to immigration. It is a halfway house whilst there still is compulsory state health, education and welfare.
You are welcome to New Zealand if:
1) You have no criminal convictions for offences that would be violent/sexual/property/fraud offences if they happened in New Zealand. A false declaration to this effect will result in deportation;
2) You accept you are ineligible for welfare, state health, housing and education (including for your family). After three years you are either eligible or you receive a tax credit to recognise your self sufficiency from the state (which also can be offered to current residents);
3) You have employment or sufficient funds to provide for yourself and your family (jointly if a couple) for three months, including an airfare to your previous resident country;
4) You swear allegiance to not engaging in any criminal activity, under threat of deportation.
After all, if an immigrant isn't a criminal and doesn't claim from the taxpayer, then why would you NOT welcome them?
Unless you're just a whinging xenophobic loser?