A "good" person (in the sense of someone whose opinions would be useful in governance) in such a situation would realize that few in their situation would be definable as "good", and thus actively endorse their non-participation as they would be an outlier that would risk the system itself if they needed to be accommodated in it. With that action, they have done the job of a "good" person in such a situation, and participated in the voting and administrative process without needing to cast a vote.