Most papers I've heard of that exhibit malfeasance come from Elsevier and it's my understanding that the journal editors manage the whole peer review process an

Most papers I've heard of that exhibit malfeasance come from Elsevier and it's my understanding that the journal editors manage the whole peer review process and are compensated by the publisher through some form of an agreement. And yes, it is the job of reviewers to at least recommend not publishing a paper that can be detected as fraudulent.