If anything, the idle minds belong to those who are constantly tired out and distracted by their work. Freeing people from this onus would mean a lot of more thought-cycles spent on important problems.

Here's another good read: http://www.zpub.com/notes/idle.html

Also, one of the top 5 death bed regrets is working too much: http://news.ycombinator.com/item?id=1643239