Quotes from an interview with Peter Suber, by Richard Ponyer. Complete blog post online at http://poynder.blogspot.com/2011/07/peter-suber-leader-of-leaderless.html.
On why OA is necessary:
“Authors need OA to reach all the readers who could build on their work, apply it, extend it, cite it, or make use of it. Readers need OA to find and retrieve everything they need to read and to allow their software prosthetics to process everything they need to process.
“OA doesn’t merely share knowledge. It accelerates research by helping authors and readers find one another. It’s compatible with intermediaries but not with intermediaries who erect access barriers to keep authors and readers apart.