Michel, My understanding is that Cahn only intended time dollars to supplement government money, and if so then it does nothing to curb the most egregious abuses by elites. Even on it's own terms the concept seems flawed in that one hour of my labor is not equal to one hour of yours. If it turns out that I'm twice as productive as you then I'm twice as productive and to pretend otherwise is (to invoke Korzybski) psychologically harmful. The anti-quota and fair-share labor systems seem reasonable to me. Production for use is a clear indicator of intent, right? It's when you weave these abstract 'scoring' systems around the process of production that intentions (not to mention material realities) become obscured. If my goal is to help my fellows (or at a minimum not add to their burdens) then I'm going to help them and any tit-for-tat accounting is superfluous at best, and a source of inefficiency and corruption at it's worst. When open systems are used to their full potential they are all about integrating intent. They provide not only a shared situational awareness of what's going on, but meta information about why, and how to change it. -Karl