Should editors and reviewers be listed alongside authors, to give them credit? Reviewing an article in your field is an interesting and rewarding experience. Any scientist has, of course, a moral obligation for reviewing other people's work just like he has his/her own work reviewed. 

That being said, it's a very time consuming process and it would be nice if you could get some credit for it. Back in ye olde days of print journals, the editorial board and associate editors would be listed in the front pages so that was a form of credit. Nowadays however, with articles being accessed individually online, the editorial board gets much less, if any exposure.

Should the editorial board/associate editors be listed alongside the authors in an article or is that not necessary? If the editors/reviewers are listed alongside the authors then this would create the problem of revealing the reviewers to the authors, in an otherwise blind review.
Speaking as an associate editor of a journal, I'm quite happy with the credit I receive: I'm listed as part of the editorial board online, it's listed on my C.V., and I get to help make sure what's getting published in my field is up to the standards of quality I desire.

That said, some journals do list the editor and even the reviewers after publication (see, for example, the Frontiers series of journals), so at least some people definitely seem to agree with your sentiment.