4 ms·

Same. "Perfect is the enemy of good" as they say. I used to be vehemently opposed to RCV; I'm still against it. It's leagues better than FPTP and my hope is th

Same. "Perfect is the enemy of good" as they say. I used to be vehemently opposed to RCV; I'm still against it. It's leagues better than FPTP and my hope is that it opens the door for improvements like STAR or anything that can satisfy the Condorcet criterion.

dllthomas 4y ago
I'm not convinced that instant runoff is actually better than FPTP. Without tactical voting (and good information to support it) the first thing IRV does (along with most variations that in practice get the label "RCV", though of course this doesn't apply to all ranked methods) is to throw out the compromise candidate that everyone likes. In the current situation, I am concerned that most people will prefer their particular flavor of theocracy to finding ways to get along (which they probably prefer to anyone else's flavor of theocracy). We already struggle with similar dynamics a bit, but it's the devil we know and I really don't want it magnified.
- manholio 4y ago
  Even if your technical argument would be correct (it's not), you would be trying to fix the problems of democracy by purposefully skewing the vote away from the desires of the electorate. That's a bad idea because it prevents democracy from working and exposing the leaders to the unfiltered democratic will of the people; so you get unaccountable leaders that can maintain power by gaming the system instead of catering for the interest of the public. Essentially, any power-mad dictator and authoritarian regime has some variant of this argument. Yes, we love democracy and voting, but we definitely cannot let those kinds of people vote or get elected. You are just espousing the softer version still accepted in some countries of "yes, the voting system is not ideal but it gives our side an advantage for now, realpolitik always trumps democratic principles".
  - dllthomas 4y ago
    Uh, no. Insofar as "the desires of the electorate" is a thing that exists, I am insisting that IRV sometimes does a piss poor job of picking it. In an election where 90% of the electorate prefers A to B, we shouldn't necessarily be picking A but we clearly shouldn't be picking B (especially with no indication of strength of preference); IRV can, and I think does in some cases that are both dangerous and realistic. Getting a little more concrete: Imagine a society split roughly evenly between 3 religions. Let's say 35% follow religion A, 30% follow religion B, 30% follow C, the remaining 5% belong to other religions or no religion. Approximately everyone with a religion (in our model; reality is more complicated but not sufficiently to make things inapplicable) prefers that society be organized as a theocracy according to their religion, would sufficiently accept secular tolerance, and violently opposes living under another religion's theocracy. In this imaginary society, what is "the desire of the electorate"? If everyone votes their honest maximal preference then the plurality says Theocracy A, which is violently opposed by 65% of the population! Picking secular tolerance over Theocracy A is not just something I (probably) prefer from the outside, but is actually preferred by the vast majority of the population over what IRV would pick!
    - yellowapple 4y ago
      > If everyone votes their honest maximal preference then the plurality says Theocracy A, which is violently opposed by 65% of the population! I'm failing to see how that's worse than FPTP, which in practice would also result in picking Theocracy A (because the 5% representing the Secular Tolerance Party would be one of those "third parties" which get blamed for spoilers under FPTP).
      - dllthomas 4y ago
        I don't claim it's worse; I'm not convinced it's better. Here they behave the same, and I think it's a pretty significant failure on both their parts. If I had to argue that IRV is worse than FPTP, I'd point out that voters already know what sort of strategic voting FPTP expects of them, while IRV is often sold on the premise that voters don't need to vote strategically and so is more likely to hit those failure modes in more damaging ways as we learn... but there's a degree of devil's advocate there. I do worry that it might be worse, but I do not claim that it is.
        yellowapple 4y ago
        > Here they behave the same Well yeah, in this particular instance they do. That doesn't mean they always do. For example, with the commonly-used Tennessee capital election scenario (https://en.wikipedia.org/wiki/Instant-runoff_voting#Tennessee_capital_election https://en.wikipedia.org/wiki/Instant-runoff_voting#Tennesse...), IRV would select Knoxville while FPTP would select Memphis - still not quite optimal for everyone (Nashville would probably be the ideal winner in a "perfect" electoral system), but good enough for the majority and a strict improvement over FPTP.
        dllthomas 4y ago
        Of course they don't always; certainly IRV is sometimes mechanically better. I believe we can construct examples where FPTP would happen to work out better given the same honest votes, although I do think they're more contrived - see below for details. I am more worried about what happens in practice, though; as I said, people understand with FPTP that they need to vote strategically and understand how to do that. Contrived scenario for FPTP picking the Condorcet winner while IRV fails to: Back to the "which theocracy, or do we just tolerance?" question, but now each religion has at least two candidates and secular tolerance has a bigger constituency. 19% S, ... 16% A1, A2, S, ... 15% A2, A1, S, ... 14% B1, B2, S, ... 13% B2, B1, S, ... 12% C1, C2, S, ... 11% C2, C1, S, ... FPTP picks S, sort of by chance, which is also the Condorcet winner. IRV consolidates the C votes behind C1, then the B votes behind B1, then the A votes behind A1, then discards S. I think that works out, FPTP makes the right choice for sort of the wrong reason while IRV makes the wrong choice. But I do think the much bigger concern is FPTP-with-strategic-voting behaving better (or at least no worse) than IRV-with-whatever-happens-in-practice.
zestyping 4y ago
It's not clearly better than FPTP. There are arguments that it might be a little better in terms of choosing an outcome, but it definitely makes auditing a lot harder, has implementation risks due to complexity, and significantly increases ballot spoilage. When you take all those factors together, I think it's overall worse.

dllthomas 4y ago

I'm not convinced that instant runoff is actually better than FPTP. Without tactical voting (and good information to support it) the first thing IRV does (along with most variations that in practice get the label "RCV", though of course this doesn't apply to all ranked methods) is to throw out the compromise candidate that everyone likes. In the current situation, I am concerned that most people will prefer their particular flavor of theocracy to finding ways to get along (which they probably prefer to anyone else's flavor of theocracy). We already struggle with similar dynamics a bit, but it's the devil we know and I really don't want it magnified.

manholio 4y ago
Even if your technical argument would be correct (it's not), you would be trying to fix the problems of democracy by purposefully skewing the vote away from the desires of the electorate. That's a bad idea because it prevents democracy from working and exposing the leaders to the unfiltered democratic will of the people; so you get unaccountable leaders that can maintain power by gaming the system instead of catering for the interest of the public. Essentially, any power-mad dictator and authoritarian regime has some variant of this argument. Yes, we love democracy and voting, but we definitely cannot let those kinds of people vote or get elected. You are just espousing the softer version still accepted in some countries of "yes, the voting system is not ideal but it gives our side an advantage for now, realpolitik always trumps democratic principles".
- dllthomas 4y ago
  Uh, no. Insofar as "the desires of the electorate" is a thing that exists, I am insisting that IRV sometimes does a piss poor job of picking it. In an election where 90% of the electorate prefers A to B, we shouldn't necessarily be picking A but we clearly shouldn't be picking B (especially with no indication of strength of preference); IRV can, and I think does in some cases that are both dangerous and realistic. Getting a little more concrete: Imagine a society split roughly evenly between 3 religions. Let's say 35% follow religion A, 30% follow religion B, 30% follow C, the remaining 5% belong to other religions or no religion. Approximately everyone with a religion (in our model; reality is more complicated but not sufficiently to make things inapplicable) prefers that society be organized as a theocracy according to their religion, would sufficiently accept secular tolerance, and violently opposes living under another religion's theocracy. In this imaginary society, what is "the desire of the electorate"? If everyone votes their honest maximal preference then the plurality says Theocracy A, which is violently opposed by 65% of the population! Picking secular tolerance over Theocracy A is not just something I (probably) prefer from the outside, but is actually preferred by the vast majority of the population over what IRV would pick!
  - yellowapple 4y ago
    > If everyone votes their honest maximal preference then the plurality says Theocracy A, which is violently opposed by 65% of the population! I'm failing to see how that's worse than FPTP, which in practice would also result in picking Theocracy A (because the 5% representing the Secular Tolerance Party would be one of those "third parties" which get blamed for spoilers under FPTP).
    - dllthomas 4y ago
      I don't claim it's worse; I'm not convinced it's better. Here they behave the same, and I think it's a pretty significant failure on both their parts. If I had to argue that IRV is worse than FPTP, I'd point out that voters already know what sort of strategic voting FPTP expects of them, while IRV is often sold on the premise that voters don't need to vote strategically and so is more likely to hit those failure modes in more damaging ways as we learn... but there's a degree of devil's advocate there. I do worry that it might be worse, but I do not claim that it is.
      - yellowapple 4y ago
        > Here they behave the same Well yeah, in this particular instance they do. That doesn't mean they always do. For example, with the commonly-used Tennessee capital election scenario (https://en.wikipedia.org/wiki/Instant-runoff_voting#Tennessee_capital_election https://en.wikipedia.org/wiki/Instant-runoff_voting#Tennesse...), IRV would select Knoxville while FPTP would select Memphis - still not quite optimal for everyone (Nashville would probably be the ideal winner in a "perfect" electoral system), but good enough for the majority and a strict improvement over FPTP.
        dllthomas 4y ago
        Of course they don't always; certainly IRV is sometimes mechanically better. I believe we can construct examples where FPTP would happen to work out better given the same honest votes, although I do think they're more contrived - see below for details. I am more worried about what happens in practice, though; as I said, people understand with FPTP that they need to vote strategically and understand how to do that. Contrived scenario for FPTP picking the Condorcet winner while IRV fails to: Back to the "which theocracy, or do we just tolerance?" question, but now each religion has at least two candidates and secular tolerance has a bigger constituency. 19% S, ... 16% A1, A2, S, ... 15% A2, A1, S, ... 14% B1, B2, S, ... 13% B2, B1, S, ... 12% C1, C2, S, ... 11% C2, C1, S, ... FPTP picks S, sort of by chance, which is also the Condorcet winner. IRV consolidates the C votes behind C1, then the B votes behind B1, then the A votes behind A1, then discards S. I think that works out, FPTP makes the right choice for sort of the wrong reason while IRV makes the wrong choice. But I do think the much bigger concern is FPTP-with-strategic-voting behaving better (or at least no worse) than IRV-with-whatever-happens-in-practice.

zestyping 4y ago

It's not clearly better than FPTP. There are arguments that it might be a little better in terms of choosing an outcome, but it definitely makes auditing a lot harder, has implementation risks due to complexity, and significantly increases ballot spoilage. When you take all those factors together, I think it's overall worse.