Fully agree but I can tell you about point 1 that there enough gullible scientists in the world that see nothing wrong with the current system.

They will gadly pick up free review when Nature comes knocking, since its "such an honour" for such a reputable paper.

Something else we can do: regulate. Like every other corrupt industry in the history of the world, we need the force of law to fix it--and for pretty much all the same reasons. People worked at Triangle Shirtwaist because they had to, not because they thought it was a great place to work.

applied for a grant last month, now to finalize grant you need to publish things in open access format. (EU country; there's a push for all publicly funded research to be open access, with it being a requirement from year ??? on, not sure when, but soon) there's some special funding set aside just for open access fees, which is still rotten because these leeches still stand to profit. then, if you miss that, then there's an agreement where my uni pays a selection of publishers to let in certain number of articles per year open access, which is basically the same thing but with different source of funding (not from grant, but straight from ministry)

i hear you, but this leaves this massive gaping hole very quickly filled by predatory journals

the better solution would be journals created and maintained by universities or other institutions with national (or international, like from EU) funding