The people that would do nothing already do not contribute and won't contribute at all in the future anyway when their jobs are gone. The few that can contribute and do nothing probably already found ways of doing nothing anyway. In the Netherlands, I can do nothing and get money; you have to be a bit smart about it but it is definitely not hard to just get money. Do more people do nothing? Nah. More people take risk and start their own small company as you have fallback anyway.

But still, what is the answer; there are no jobs soon (<100 yrs) for most people, what does 'doing nothing' mean then?