You really are economical with the truth. Robertson gave the RB access to a wider range of AMP tools and then put pressure on them to use them. Not to mention the infinite loop of Treasury issuing Government Bonds and the Reserve Bank having to buy them to keep control of inflation and interest rates. Although the Reserve Bank has stopped purchasing the Treasury hasn't stopped issuing bonds.
So much for independence:
Since March, the Reserve Bank had been printing tens of billions of dollars and pumping it into the economy using something called LSAP (Large-Scale Asset Purchases). The LSAP worked; New Zealand's unemployment rate of 4.9 per cent is well below where economists feared it might be.
But the LSAP has had some negative side effects too. Asset purchases have pushed interest rates down, unleashing a wave of cheap lending that has sent the housing market rocket to record highs in the midst of a global recession.
Robertson had initially been sceptical of the link between the Bank’s money printing and high house prices, but the Reserve Bank letter marked the point at which Robertson officially acknowledged that not only was the Bank’s money printing having an effect on the housing market, but that he and the Bank should work together and do something about it.
https://www.stuff.co.nz/national/politics/300223358/reserve-bank-repeatedly-warned-government-money-printing-would-lead-to-house-price-inflation
https://www.stuff.co.nz/national/politics/300166483/grant-robertson-writes-to-reserve-bank-saying-its-time-to-think-about-house-prices