Institutions v Collaboration

In this TED talk Clay Shirky highlights the differences between the institution and collaboration, and the way they get things done. In particular he compares the costs and values of each and points out that in a collaborative effort some people contribute a lot and others contribute a little. However, small contributions may make a significant difference. I would expect the same in Interactive Democracy: most of the contributions would come from those that are interested in politics with occasional valuable contributions from others.
Clay also describes how Institutions resist the loss of control that collaborative organisation brings. I would expect the same from Westminster.