And it's not just the current crop of MPs who are investors. Former Prime Minister Helen Clark owned a few rentals and the Greens even had their own cunning scheme where they set up a fund to own residential property in Wellington, which was then rented out (to its own MPs no less).
Although there is all this talk that politicians want to suppress the property market and keep house prices down, it will never happen for many reasons.
One is the vested interests of politicians. A second is that it is unwise for any government to start intervening in markets. But, perhaps one of the bigger reasons is that property is a significant part of our economy. It's not just investors. It's banks, real estate firms, property managers and valuers, plus all those maintenance people, from plumbers to glaziers and painters. Rising house values stimulate the wealth effect which encourages people to spend more money. There is nothing wrong with that, as long as it is reasonable rather than avaricious.
This year's Budget, thankfully, was a non-event for property investors. Maybe that's no surprise as property investment is heavily the domain of National MPs.