It is easier for the 80% to support this policy if you define the 20% who need to pay more tax based on their total income (which is direct income plus indirect income plus the notional rent based on say 3% of their rateable value).
Not that clear cut. The people with high income are already paying their fare share
The 20% we want to target are the 20% who are the most wealthy, indeed the tax cuts can be designed to ensure that. What wealth level does that cut in at? Who knows, wealth data in New Zealand is pretty sparse to be polite. It doesn’t matter in terms of policy design, you can implement the package so that the 20% point happens no matter what the actual wealth numbers turn out to be. If you think about it logically you could take all the revenue of one person and distribute a fraction of it to each and every other person. We each wouldn’t get much of course. So the question is a bit futile. It does amuse me however when I come across people who love the idea so long as they benefit - tells you a lot doesn’t it? The question is pretty simple with this tax reform - do you want a fairer New Zealand or not? Closing the loophole will achieve that.