I think the debate on information gets sidetrack because policy makers and analysts state it generically. The issue for me is not really about "critical mass" as you suggest, rather it is about the type or form of information. For example in Brazil we have see that publication of information on performance reduce corruption. That information was costless and in itself helps. On the other hand in Zambia government publishes many reports that no one ever reads, even if they are freely available. So the key is definitely being clear about what information is useful and in what context. Also let us not forget the linkage between education and information.