Danger! Danger, Will Robinson! You're sounding like a Keynesian--or at least like John Maynard Keynes in "Economic Possibilities for Our Grandchildren"...
:-)
Laura Tyson will tell you that greater worker control over the workplace in Yugoslavia did give workers in successful firms a strong incentive not to replace their comrades who quit--because then the rents from market position were shared out among fewer people. Thus the more successful a factory was, the slower its labor force tended to grow. (To be fair, the fight over whether this was just a "tendency" or an empirical fact was never resolved.)
Practically everyone will tell you that every bureaucracy that isn't under strong market discipline--and some bureaucracies that are under strong market discipline--tend to develop pathetic and extreme amounts of "slack." How do you empower the clients of an organization that provides "decommodified" goods and services?
Market failure in financial markets I understand. How to improve them seems to me to be much harder (although there do seem to me to be a bunch of things worth trying)...
Thus I tend toward liking large guaranteed minimum incomes, lots of vouchers for people to spend, and substantial tax penalties for all short-term financial investments...
But this strikes me as rather thin gruel compared to our common utopian dreams...
Brad DeLong