Copyright has nothing to do with innovation. That's patents (publish your tech secrets in exchange for exclusive use for a period of time). Copyright is about protecting creative works, which are, by their nature, much much easier to copy than to make. If I write a book, and bring it to book printer to print 10,000 copies, I think we can all agree we prefer the world where that printshop can't turn around and print as many copies as they want, selling them themselves, and never paying me a dime. So I need some legal concept that says my creative work is mine alone to copy, that I can sell exceptions to.
Comparatively, society loses out on a lot less with long copyright terms compared to long patent terms. Long patent terms stifle innovation, long copyright terms just mean I can't freely distribute my own copies of others' art.
IMO, the happy compromise would be a tapering of copyright over time. For the first, say, 2 decades, you have contemporary copyrights. You can choose who to license your rights to, including the production of derivative works and the like. For the next 2 decades after that, a price is codified such that you still are guaranteed a cut (variable on whether the work is a verbatim copy, an adaption, or something significantly different). For the next 2 decades after THAT, you get a smaller cut, and non-commercial use becomes a free-for-all. After 80 years, it's a free-for-all.
You surprise me with a proposal for shorter copyright terms. Interesting!
For fun, here's an interesting discussion countering my own earlier statements - Once a work is in the public domain, it seems there's very little to do with an idea except drag it through the mud. Audacity is what drives commerce i suppose. For example as soon as Mickey Mouse entered public domain all the news could talk about was horror films and "adult" films capitalizing on the "what're you gonna do about it" of the moment.
Similarly when Peter Pan entered the public domain there was a short glut of "now he's a nightmare / villain" representations before becoming irrelevant again.
Imagine creating something like Sesame Street or Mr Roger Neighborhood then a mere 30 years later everyone has more fun making "Mr Grouch Goes On A Murder Rampage" bloodbath and "Mr Rogers + Freddie Kruger Teamup" art / film / trite youtube videos.
It'd be pretty soul crushing.
"Tragedy of the commons", as it were.
With this in mind, perhaps... your idea could deal with that via tiered pricing of "official / approved / canon" works are charged the standard fee whilst "unofficial / unapproved" works tithe a larger proportion of the proceeds to the original author...
The biggest annoyance here is the discussion always focuses on protecting individual creators whilst the laws and benefits seem to go to large corporations. e.g. Disney would have no problem using Peter Pan without consequence, while the rest of us wouldn't dare use Steamboat Willie.
Comparatively, society loses out on a lot less with long copyright terms compared to long patent terms. Long patent terms stifle innovation, long copyright terms just mean I can't freely distribute my own copies of others' art.
IMO, the happy compromise would be a tapering of copyright over time. For the first, say, 2 decades, you have contemporary copyrights. You can choose who to license your rights to, including the production of derivative works and the like. For the next 2 decades after that, a price is codified such that you still are guaranteed a cut (variable on whether the work is a verbatim copy, an adaption, or something significantly different). For the next 2 decades after THAT, you get a smaller cut, and non-commercial use becomes a free-for-all. After 80 years, it's a free-for-all.