KiwiBank Home Loan Sale

Anyone else fascinated by the KiwiBank home loan sale on at the moment?
In that the only bank currently discounting rates in the face of the rhetoric of the housing market causing inflation seems to be the Government owned bank?

So the questions would have to be -
Has KiwiBank been given the OK because the Government really does acknowledge that it is their spending that is inflationary, not just the housing market?
Is KiwiBank the only bank that can sustain these squeezed margins, because at it's heart the money returned to the Reserve Bank via the OCR still has the same shareholder...
Does KiwiBank know something about the future direction of NZ's monetary policy that the other banks don't?