Now let's add another complication. Let's assume that some players' voting mechanisms are broken, so they always vote to defect, and are unable to change that. It feels moral to punish those who defect voluntarily, but it feels immoral to punish those who merely randomly received a broken voting mechanism. -- I am speaking about people who are too stupid to do the kind of work that is important in a modern society. As opposed to people who could do the work, but are too lazy, if the system allows them. Both of them are mixed in the category of unemployed, with no easy way to distinguish between them.

/me shrugs

Disability screening in the real world isn't perfect, but it works at least tolerably well. ("Tolerably", in this case, means that nobody appears to be making a political issue out of it not working.)