I think there's a big question of what "allowed to" means here.
"We throw them in jail if they don't"? We don't do that presently.
What we're talking about is "in addition to anything they earn, they choose the disposition of $X/yr", for various values for X. If X is $1, clearly everyone is still working. I agree with you that the $40k figure you cite downthread is extremely likely to be higher than we can support. I think there are intermediate values that might work substantially better than $0. Based on toying with numbers that I've done in the past, my guess is that the optimum value $4k and $9k/yr (though I'm not all that confident in that and would probably want to see it ramped up gradually). If you claim that this would mean "essentially all manual labor stopped overnight", that certainly needs a citation.
"We throw them in jail if they don't"? We don't do that presently.
What we're talking about is "in addition to anything they earn, they choose the disposition of $X/yr", for various values for X. If X is $1, clearly everyone is still working. I agree with you that the $40k figure you cite downthread is extremely likely to be higher than we can support. I think there are intermediate values that might work substantially better than $0. Based on toying with numbers that I've done in the past, my guess is that the optimum value $4k and $9k/yr (though I'm not all that confident in that and would probably want to see it ramped up gradually). If you claim that this would mean "essentially all manual labor stopped overnight", that certainly needs a citation.