It is amusing to hear Grant Robertson MP slagging ACT and National for letting the Epsom voters increase the effective vote of the centre right.
He understands it perfectly. In Wellington Central in 2008 he gained vital votes from Sue Kedgley's effective steer of her Green supporter electorate vote to him (and away from her).
Of course I tried hard to head that off. But I could not complain that is was unfair, or somehow an insult to electorate voters as Mary Wilson tried to get Mr Goodfellow to agree last evening.
In the 2002 and 2005 campaigns I openly steered ACT supporters away from me and toward Hekia Parata, then Mark Blumsky, with their electorate votes.
We did not invent MMP but we have to work under it.
MMP as we have it now was invented by MPs. We do not have the MMP system as the Royal Commission recommended it.
Labour and National MPs introduced the single-seat rule for minor parties that is the at the centre of such gaming of the system.
So you're right. "We" the voters didn't create MMP as it is now, but "we" the MPs in the 1990-1993 Parliament did "invent" the rule at the centre of your post.