Here are two potential killers of this government (besides the Maori party which is dividing part of Labour’s core vote).
The first of these two other killers is “political correctness” — “PC”.
Of course, what is politically correct or, more accurately, politically incorrect, is in the eye of the beholder. The trick is to get your opponent seen as offside with majority values and too closely aligned to minority values — that is, correct about values the majority doesn’t care for.