SODA voting (Simple Optionally-Delegated Approval): Difference between revisions

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==== Prevent sliver candidates from having kingmaker power ====
==== Prevent sliver candidates from having kingmaker power ====


Optional rule 4.5 (between 4 and 5): If any candidate has less than 5% (of the total votes) as delegable votes, and is not one of the top two in total votes, then those votes are automatically delegated to the the Condorcet winner (considering known ballots and preference orders) among the candidates on their preference list, or, in case of elections with a cycle, to the second member of the Smith set (correct CPNE strategy for a Smith set of 3; larger Smith sets, with over two members included in the minor candidate's preference list, are hit-by-lightning unlikely).
Optional rule 4.5 (between 4 and 5): If any candidate has less than 5% (of the total votes) as delegable votes, and is not one of the top two in total votes, then those votes are automatically delegated down their preference list as far as the Condorcet winner (considering known ballots and preference orders) among the candidates on their preference list, or, in case of elections with a cycle, as far as the second member of the Smith set (correct CPNE strategy for a Smith set of size 3; larger Smith sets, with over two members included in the minor candidate's preference list, are hit-by-lightning unlikely).


This rule would help make this system more attractive to major-party politicians. But it's a principled rule, not just a sop to the major parties. Consider the "kingmaker" case: in a basically 50/50 split, some tiny party has the balance of votes, and manages to extract concessions far bigger than their base of support justifies, just in order to [not] delegate those votes. That's unjust, and this rule would prevent it. So this rule is recommended whenever people will tolerate the complexity.
This rule would help make this system more attractive to major-party politicians. But it's a principled rule, not just a sop to the major parties. Consider the "kingmaker" case: in a basically 50/50 split, some tiny party has the balance of votes, and manages to extract concessions far bigger than their base of support justifies, just in order to [not] delegate those votes. That's unjust, and this rule would prevent it. So this rule is recommended whenever people will tolerate the complexity.
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