Quote:For the sake of the argument, let's not worry about Candidate C.
Why not? Does he not matter?
Quote:The voters gave equal preferences (5) to each of the major parties.
Why are you explaining it this way? Are you saying 10 people voted for candidate C? And 75 for D and E?
Quote:75 disgruntled people who would rather not have helped either of them win
30 of them are just disgruntled because they lost. Their least favourite candidate won. It sucks, but that's democracy for you. Not everyone wins. The other 45 still got to have a say, and because they had a say, the outcome changed for the better, from their perspective. This is a good thing, not a bad thing as you seem to argue.
45 people are better off because they voted in the election between A and B. Like I said, ranking all candidates cannot possibly work against your interest. Not a single voter in your scenario ended up worse off because they ranked all candidates.
Quote:Result - Candidate B wins, and we have 75 people who might not like the result, but are at least are comfortable in the knowledge that they had no part in his election.
That is totally absurd. The outcome is worse. The same logic would say that these people would be just as happy with a dictatorship, so long as they didn't actually help the dictator gain office. It is irrational to rpefer a worse outcome specifically because you didn;t have a say in the matter. It is some kind of logical fallacy.
A candidate won who is less favoured by the general public than his main competitor. You argue that the people are happier because of this, even though the outcome is worse, because they didn't have a say in the matter. Their response is irrational. No-one in their right mind would prefer a worse outcome just because they missed their opportunity to make it better. And either way, one of the two main candidates wins, so your argument that MPV helps the two main candidates is wrong. If all you care about is the two main candidates vs the minor candidates, then it makes no difference. No-one is worse off. If, as is the case in reality, you also care about who actually wins office, then the people are better off.
The people who are disgruntled in the first example are only disgruntled because they don't understand how the system works. They think it was a single election in which they helped B win over C. that is wrong. It never happened. It was four elections. Their favourite candidate lost the first 3 elections. Then there was a fourth election between A and B. In that election, the more popular candidate won.
In an election with 5 candidates, not everyone is going to see their favourite candidate win. This is not a flaw. Not everyone can win.
Quote:Now you're going to say that you can look inside the minds of these 75 people and say that they could have put the preferences the other way round
No. Why would I say that? The system requires people to rank honestly.
Quote:and that they mostly wanted to vote in a major party as a last resort
No. That is not how it works. It doesn't matter whether they value voicing their support for C or D most or having a say in the real battle between A and B most. What matters is that they voted in all 4 elections, and had their say in all 4 elections. This is the beauty of preferential voting. If people understood it better, the whole OPV thing would disappear overnight. The fact that C, D and E lost an election is not a sound argument for not voting in an election where only A and B are candidates.
In this case, people want two things. They want to voice their support for a minor candidate (C, D or E). They also want to have a say in whether A or B wins. There is no tradeoff between these two things. They can do both. They can vote in an election where only A and B are candidates. Doing so in no way diminishes their support for the other candidates.
Note however that OPV can actually benefit the two main candidates. OPV can cause one of the two major candidates to win, even though the majority of the public would have preferred a third candidate. OPV benefits the major parties.
Arguing for OPV is no different to arguing that you shouldn't have to vote at all because you don't like C or D either. The principle is the same. People just get confused and think it is a different principle because they rank candidates rather than voting for a single candidate. However, even with preferential voting, you still only vote for one candidate in each election, and that candidate is always your favourite out of those on the ballot. The only difference is you don't have to turn up to the polls a dozen times.
I think it would be easier for you to understand if you viewed it as a number of completely separate elections. That is what it is. It's just that you only have to turn up to the polls once.