protecting authors from publishers who'd otherwise just use their vast resources to outprint and outsell them with no remuneration

But no idea is unique, not to an individual, and certainly not to a corporation. And small scale creators always get the short end of the stick anyway, so removing intellectual property rights would harm them less (if any) than large scale content rights hoarders.

What if you're too poor to enforce your intellectual rights anyway? What if you sell your rights for pennies with your back against the wall? That's why I'm saying small creators get the short end of the stick. Yes, there are success stories of writers who got an honest publishing deal and could start living off their work through intellectual rights, but what about the hundreds or thousands who can't? Might as well make writing a hobby altogether and make books/films cheaper.

Of course this would fit more nicely with UBI, but so far intellectual rights have been doing more harm than good (patent trolls, patent wars, business secrecy). The entire computing industry currently relies on free software already, I feel like this isn't that much of a stretch.

no, not derivatives or similar work, your actual work. without copyright, anything you put out into the world can be taken and republished by anyone with more resources, in larger quantity than you can manage, in wider distribution than you can manage, with no compensation to you. an example of this is pornhub and similar sites, which make money from content lifted straight from independent producers. large distributors have the leverage to keep their content off of the sites and use them as advertising platforms instead, but overwhelmingly, content purchased from smaller paysites and portals is uploaded without consent, license or remuneration from producers who lack resources to fight.