Technofreak:
The Clean Car Package may turn out to be the best thing New Zealand should have done but justifying it on the basis that this is what everyone else has done doesn't stack up unless you also compare countries that are very similar to New Zealand. Population density, population affluence, infrastructure, geography, public transport etc. All of these things affect where we drive, how far we drive, what style/size of vehicle we drive etc.
New Zealand isn't that unique.