Presumably, he is interested in a solution to the class of problems, not to an individual instance of the problem. Giving up half your income in taxes in his me

Presumably, he is interested in a solution to the class of problems, not to an individual instance of the problem. Giving up half your income in taxes in his method is a proposed solution to the class of problems. Giving up half your income when no one else is is a proposed solution to a single instance of the problem. And with universal basic income, recall that there is no 'picking' performed.