 What does Google do for their employees to foster innovation?
Its very unpredictability makes it unwise to build systems that take too much away from what human beings do best: look, think, innovate, adapt, discuss, learn, and repeat. That is why we have seen many more systems take on a loose, human centric model in the last decade and a half: from the radical divergence of Toyota’s production system from the highly structured model put in place by Henry Ford, to the Internet’s radical departure from the AT&T system that preceded it, and on to the way Wikipedia constructs human knowledge on the fly, incrementally, in ways that would have been seen, until recently, as too chaotic ever to work (and are still seen so be many).
 One day a week, they can pursue whatever ideas they like.
 They use Segways on the Google campus and in the buildings.  They have a relaxed dress code.  One day a week, they can pursue whatever ideas they like.  They have a culture of play.