What does productivity have to do with people's choice of working or not? We were discussing whether people need encouraging to go to work or not. Productivity is a completely different metric, impacted by many other things.
Productivity is a part of the metric which you base that decision on. Do people need encouragement == will we produce 'enough' with less encouragement || is the long term reduction in production, and it's effect on future generations worth the increase in leisure time now.
