I have been thinking about this for a couple of days now; here is my proposal for how to fix the overhang issue:
Note - by fix, I mean maintain the two vote system, whilst also preserving proportionality (as closely as possible); whilst also pissing off the fewest people.
Note 2 - this system does not completely eliminate the overhang, but will significantly limit its influence.
The proposed system will work; from the voters point of view; exactly as the current system does with a party vote and a candidate vote.
Each party is afforded precisely one overhang seat if the vote count comes out that way. Limiting the size of parliament to 120 + (the number parties)/2, rounded up. So with seven parties the limit is 124, this is unlikely but possible.
Any other overhang seats are "flipped"; to the second place getter; starting at the closest races in each electorate. These are the places where a few hundred votes either way would have put the second place candidate in. This is going to piss off a bunch of people, but this is statistically the fewest people that are pissed off.
The only dispensation where a seat cannot be flipped is if the seat is that of the party leader(s).
The allowance of one overhang seat; means that parties HAVE to campaign on the party vote, as more seats means nothing to them beyond that. This also allows for TPM to get say 2.5% of the party vote which would allow 3 seats, but have a 4th from their allowed 1 seat overhang.
The reason I have settled on this as the "best" option, is three fold.
- Fewest changes for the voters of NZ; educating the public on a new system is difficult.
- 1 seat overhang, still reflects the will of the people if a party really does have a whole bunch of great candidates but shit party....seems weird but possible.
- Candidates will really have to work not to have their seat be a "close" race, be visible and serve their communities.
Current election results:
This gives a 122 seat house, compared to the 131 seats we are looking at.
The current election results are quite unfair to TPM under my system; mainly because their strategy to shift party vote was well executed. If they got their 2023 result of 3.1% it wouldn't be so distorted. The numbers would shuffle around a bit and that 3% would likely have come from Lab/Grn.
TPM 2023 would have got 4 seats + 1 in overhang; giving them 5 instead of the 6 they actually got in 2023.
2023 would have see a 121 seat house rather than a 122 that we actually got.