I have just learnt from facebook that the Justice select committee of parliament is holding an inquiry into the 2020 election. This is apparently something routine after each election. Unfortunately the closing date for submissions was 6 April 2021, so I missed it by a week or so.
From what I have read, the problem of wasted votes creates a barrier to participation in the electoral process. In the 2020 election, about 8% of party votes were disregarded because the voter voted for a party that did not pass either of the thresholds, being 5% or an electorate seat.
Young voters are likely to be interested in new ideas and new parties. But we have a system that disenfranchies anybody who votes for a party that does not pass one or other threshold. This disenfranchisement of minor party voters, perhaps mostly young voters, has a discouraging effect on voter participation.
MMP aims to be a proportional system. But bizarrely we have chosen to disenfranchise a small but significant proportion of voters by discarding their votes. This is a severe deficiency in our supposedly proportional electoral system.
And the problem is not one of the size of the threshold. Reducing the threshold would indeed reduce the problem, and eliminating the threshold would eliminate the problem.
But the problem can be better eliminated by giving voters a second choice of party vote. This solution means that every voter can have a say in the makeup of parliament, as well as expressing support for a minor party.
The two-choice system for party voting effectively decouples the size of the threshold from the issue of wasted votes. We can retain MMP with the threshold at whatever level we want, and still have a highly proportional electoral system.