It's also worth noting that the vast majority of VC firms are not KPCB or Sequoia or one of the other "name-brand" VC firms, and that most entrepreneurs who receive funding will not do so through one of these firms either.
And while it's probably true that most VC money is not from pension funds, much of it is institutional in origin (incl. state pension funds), just as much of hedge fund money is institutional, and the VCs themselves take on limited risk, since they typically get a management fee, and then some sort of performance fee as well, while risking relatively little of their own capital (2 and 20 is common among VCs as well as among hedge funds). The underperformance of VC as an asset class is well documented as well.
This paper [1], which is the Kauffman foundation's assessment of the performance of its VC related investments, describes in detail the VC industry as it currently functions. I think you'll find that it is closer to the way Michael O. Church describes it, than to your conception of it. Everyone considering a startup should at least read the executive summary.
[1]: http://www.kauffman.org/~/media/kauffman_org/research%20repo...