> The reason why many managers fail to see and address this problem is that they are used to looking at communication and assume it's a good thing. Because they see activity. People are attending meetings, talking to each other, the online presence indicators are bright green. Clearly, a lot of work is happening!

Yes, this. And a similar problem occurs when manager-types try to come up with metrics to measure programmer productivity. Their yardsticks for what constitutes meaningful work, as a manager, cannot simply be translated over to makers.