Is that not better than adopting a more classic proprietary model where the source code isn't available?

I totally agree with the philosophical argument around OSS --but at the end of the day, people need to eat. If you're going to argue that we should all OSS our code, you need to specify a way to make it sustainable (see http://www.fordfoundation.org/library/reports-and-studies/ro... for more on the unsustainability).