Page Charges for Peer Review?

I was just part of a paper that was accepted by a journal that charges the authors a page charge. I actually wasn't aware that such a policy existed until we received a bill for the paper. Here is their (The American Physiological Society) policy:

Page Charges
To recover part of publication costs, the APS charges authors of research articles $70 per printed page. By signing the Mandatory Submission Form, the author agrees to pay page charges once his/her paper is published. (Forms customized to your manuscript will become available on completion of the submission process; check the Home Page of the journal you are submitting to for blank forms.)

Now, while there is nothing illegal about this, I believe it is highly unethical. Let's analyze this. If I submit an article to this society, they have volunteer peer reviewers that review it for scientific merit -- no cost there. If my article is accepted, I 'Pay' the journal to defray publication costs. But then the Journal turns around and charges libraries and others to view the published articles. Why do I need to pay for something to get printed then others pay to view it. This sounds like double-dipping to me. Because the Journal makes money from my article, maybe they should pay me if the reviewers accept the paper? Should I send them a bill for manuscript preparation costs?

I just think that this could be interpreted as non-peer-reviewed as authors are basically paying $1000 to this group to publish a paper.