I am hugely in favor of this move. It's a tiny first step to decreasing the cost of education and further opening educational access to truly everyone.

But, if I may indulge in a cynical moment, I note that one of the touted benefits of CC-BY in the article is that commercial companies can develop tutorials from these tax-payer funded books.

What if the tutorials then become the required texts? Are there any safeguards from this? If not, it's inevitable that it will be done.