Earlier quoted context omitted.
You're certainly right about authors and peer-reviewers, but are you sure that editors don't get paid with some of that money?
Yes. The "editors" for most such publications do not edit, they make publishing decisions. Copy-editors are expensive, and paid for by the researchers, not the journals.
My spouse is an editor at an academic journal in her field and does some of both. In papers selected for publication, she does exert editorial input. In terms of remuneration, it is a compensated position; but how the money flows between the academic society, the journal and Elsevier, that part is lost on me.