10. Dopp: “IRV entrenches the two-major-political party system …”

IRV neither "entrenches" nor "overthrows" the two-party system. It simply ensures no candidate wins over majority opposition. If a minor party has the support to earn a majority of vote, it can win in an IRV election. If not, it will not win.

This is pure smokescreen. Sure, it doesn't *guarantee* a two-party system. It merely makes its continuation highly likely. That's what Dopp meant by "entrenches." IRV has no record of assisting in the overturning of a two-party system, but there is an obvious way in which it helps maintain it.

It eliminates the first-order spoiler effect. Major parties can then, with less risk, ignore minor parties.

Whatever the mechanism, that's what seems to happen. See the description of OPV at:
http://www.abc.net.au/elections/federal/2004/items/200407/s1162263.htm

This is Antony Green of ABC writing about Optional Preferential Vote:
"In almost every case, optional preferential voting will assist the candidate with the highest primary vote." In other words, OPV will behave like Plurality, most of the time. And Plurality is well-known to strongly favor two-party systems.

IRV is a winner-take-all method, like plurality voting and two-round runoffs. However, IRV allows independents and candidates with minor parties to run without being labeled as spoilers.

Same as two-round runoffs. However, runoffs have surprises, quite often (about one-third the time). With IRV, that is much more rare.

With top-two runoff, a third party only has to muscle its way up to second place to make it into the runoff, not all the way to the top. Suddenly it has credibility for that election. If I were involved with a third party, I'd want to see Top-Two runoff, real runoffs, not IRV, which gives me almost no chance to convince the pubic that my party is viable. Robert's Rules of Order deplores the characteristic of collapsing an election into one ballot, with no runoff possibility, precisely because it doesn't allow the extra consideration that repeated balloting does. Given that in most systems, the lower preference candidates are not actually eliminated, it is simply "suggested" that voters pick one of the top two -- because that's all that is on the ballot -- Top Two runoff, with write-in votes allowed, actually fulfils the Robert's Rules preference for repeated balloting, particular if a majority remains required.

This may reveal a higher level of support for these parties, and if these parties are attractive to voters, their support may grow.

Apparently it doesn't work that way.

Relating to multi-party representation, any winner-take-all, single seat election method tends towards two dominant parties, at least in any given geographic area. To allow for multiple parties to regularly win office, jurisdictions should adopt a form of proportional representation in which candidates will be able to win office with less than 50% of the vote.

Actually, want to go whole hog, use Asset Voting, first proposed by Lewis Carroll in 1884. He proposed it, actually, for proportional representation using STV. And exhausted ballots? Well, he wrote, a voter who wasn't familiar with all the candidates could choose to vote for just one, and then this candidate could "spend" these votes to create seats, as if it were his own property. Warren Smith, proposing Asset Voting in 2004, used the same metaphor, the votes are the candidate's "Assets."

But Asset Voting also works if the ballot is a standard vote-for-one ballot, or an Approval ballot (if it is Approval, because no votes are wasted, votes for more than one must be divided or else the voter would get more than one vote of effect on the election, and that's more complicated to count.) And then the Assembly is composed of all candidates who get a quota of votes, either directly or through vote transfers controlled by the candidates. Very, very simple, and thoroughly, intensely democratic. But this is for another day.

STV is quite a respectable method for proportional representation, it is only when it is used single-winner that it becomes seriously problematic. There are better methods, though, that are precinct-summable, much simpler to count.

Note that Australia’s IRV elections are often cited as an example of two-party domination. But while the two major parties (one of which is divided into two parties, with one party running in one particular region of the country) dominant representation, the minor parties contest elections very vigorously, with an average of seven candidates contesting house elections in 2007. That year the Green Party did not win any seats in house elections, but it ran candidates in every district and earned 8% of the national vote. It naturally would prefer a proportional representation system, but supports IRV over alternate winner-take-all systems and uses it to elect its internal leaders.

Could it be that it supports IRV against its own interests? Notice that it isn't winning any seats. What does that say? It says to me that IRV makes them irrelevant. With a plurality system, for example -- which I don't recommend -- and 8% of the vote, they'd have serious clout. With IRV, they are defanged.

Continued with:
Dopp: 11. "Could deliver unreasonable outcomes…."
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