If there is a Grexit, which seems to have now become more likely, (but obviously could go either way) you would think the dollar rallies at least initially anyway, so Kiwi lower. All will depend on the fallout and its the first time I have heard the likes of Key playing down a Grexit, so it appears they think it will happen. The debt has largely been privatized, (Banks bailed out again) so its now the European taxpayers & IMF mostly on the hook.
Criminal how bail out funds to Greece was purely to ensure commercial banks got their money back & taxpayers pick up the bill.