Seems fair to me.
What you're actually going to see is a cottage industry of lawyers setting up citizen-owned shell corporations to funnel this money through -- minus their fees of course.
Just a few months ago, US govt started a program where if a foreigner buys real estate of a certain value ($4 million?) in certain hot markets like Los Angeles, NYC, they have to report it to Treasure or IRS. As of now, that value is too high to be effective imo, but there are ways.
It still took an additional 6 years (roughly) to sell, but throughout that whole process, 99% of the potential buyers, including the eventual purchasers, were Chinese nationals. I lived in that house and met everyone that came through (including the time Anna Chapman came through to show the house...wow).
There's an entire class of real estate here that just has no market without Chinese money coming in.
The "no sales to foreigners, let's curb immigration" is a sop to affronted New Zealanders of European and Māori descent, who are increasingly finding themselves outbid by recent (last 20-years) Chinese migrants who not only want a house for themselves but also want to participate in the only economically thriving part of the NZ economy that doesn't require a dairy farm: real estate.