One issue that comes up with multi-winner approval voting is: suppose there are 15 longtermists and 10 global poverty people. All the longtermists approve the LTFF, MIRI, and Redwood; all the global poverty people approve the Against Malaria Foundation, GiveWell, and LEEP.
The top three vote winners are picked: they’re the LTFF, with 15 votes, MIRI, with 15 votes, and Redwood, with 15 votes.
One issue that comes up with multi-winner approval voting is: suppose there are 15 longtermists and 10 global poverty people. All the longtermists approve the LTFF, MIRI, and Redwood; all the global poverty people approve the Against Malaria Foundation, GiveWell, and LEEP.
The top three vote winners are picked: they’re the LTFF, with 15 votes, MIRI, with 15 votes, and Redwood, with 15 votes.
It is maybe undesirable that 40% of the people in this toy example think those charities are useless, yet 0% of money is going to charities that aren’t those. (Or maybe it’s not! If a coin lands heads 60% of the time; then you bet on heads 100% of the time.)