I'm a bit conflicted about this. On the one hand, it's easy to characterize what's going on as stealing. The publishers are in the business of publishing these articles in their journals and selling subscriptions to university libraries and others who can afford the hefty1 subscription price. The problem is that individual researchers write the articles, other academics review them, and still others serve as journal editors. None of these people are paid for their efforts. The publishers might do some minor tweaking of the papers' $\LaTeX$, print them in the journals, and essentially sell the academics' work back to them.