TheUngeek: I don't mean in political parties, I bet you more than 5% of this country would vote for something like that.
Plenty of cases where 5-10% of NZ would want something that is completely ridiculous.
Hence the need for the 5% threshold to be a lot higher. At least 10% IMO.
If your party cannot get 10% of the popular vote then you have no seats.
I absolutely disagree with the suggestion that 5% of the New Zealand population would support ethnic cleansing, but I understand where you're coming from. Raising the MMP threshold and abolishing the electorate "back door" might be a good compromise between those who support MMP versus those who have concerns about the implications of having too many small parties in parliament.