A real test would have to - pick participants at random (regardless of employment status) - give money to all the participants - make all participants pay hi

A real test would have to - pick participants at random (regardless of employment status) - give money to all the participants - make all participants pay higher taxes to finance For this to be realistic, the participants would not have a choice whether or not to participate. So yeah, I can't for the life of me think why we "can't ever design such experiment right".