I've heard people complain that standards of English usage have deteriorated, and they'll point to errors in recently published books, such the one I just mentioned, as proof of it. I explain to them that what has diminished isn't knowledge of English, which was never high in the general public, but the number of copyeditors in the publishing biz. As costs were cut (a trend that started as a byproduct of publishing companies being absorbed by non-publishing corporate behemoths, long before the current economic crisis), copyeditors were among the first to go. Twenty or thirty years ago, that misuse I mentioned would have been caught and corrected by a poorly paid copyeditor, and readers would never have known that the author didn't know the difference between lie and lay. (Just in case you're confused, see here.)
Even decades ago, you'd read books with grammatical errors. Those were novels by authors of such stature (i.e., earning power) that publishers would accede to their demands that their writing not be edited. Go still further back, to the early days of mass printing, and spelling and grammar varied wildly from one book to another. Did that damage literature? Weren't all those earlier times part of the Golden Age, from whose heavenly standards we've fallen so far?
In other words, should books be copyedited for grammar and spelling at all? If a writer doesn't know the language, should that be hidden from the reader? Of course publishers want the books they publish to sell the largest possible number of copies, but earlier times had bestselling authors whose grammar was a bit wobbly or at least eccentric. Lots of people bought the Sookie Stackhouse books even before the HBO series, and I bet most of them didn't know or care that the author uses an intransitive verb transitively.
Anyway, isn't it dishonest to extensively massage John Smith's original manuscript and still label it a work by John Smith? At the least, shouldn't publishing emulate Hollywood and have a page of credits reading something like
(Catchy title by Ima Serf, Editorial)
A Novel
Story: John Smith
First Draft: John Smith
Draft with corrected chronology: Poor Schlub, Editorial
Draft with fixes to absurdly messed-up character references: Harold "Harried" Braindead, Editorial
Grammar, spelling, and usage corrections: Nameless Freelance Copyeditors
Cover design: Etc.