I've noticed this before, and brought it up with a couple of my professors a few years ago. They brushed it off, saying that the subscriptions are mainly bought by universities and other institutions, so nobody ends up paying an exorbitant cost. What I inferred, but they did not actually say, was that universities and similar institutions got much better deals on them, the way insurance companies get better deals from medical care providers by dealing in bulk and being in a better bargaining position.
They were both pretty civic minded individuals, but I suppose I was wrong to assign such a high likelihood that if there were serious gouging going on and the subscription prices weren't commensurate with journals' operating costs, they would have shared my concern rather than dismissing it because they didn't personally have to care about it.
link
Razib Khan found this paragraph rather striking (who is reminded of this episode of South Park) and I would tend to agree that its a rather convincing argument.
Are publishers really so successful as rent seekers or is there something the original article is missing here? Also what useful strategies would LWers recommend to help minimize costs for someone trying to practice the virtue of scholarship? The obvious suggestions (implied in the article) seem to be emailing authors (and perhaps those suscribed) asking for the papers and acquiring and paying for membership in some libraries.
Another obvious option is using ... liberated databases of such academic papers.
Edit: Just wondering, has this been discussed before on Lesswrong?