

5 year patents should exist IMHO. I think that’s a reasonable chance to monetise an invention. Short enough to remove the use of patents as munitions between companies.
After that it’s open season and you’ve allowed society to use it in any way in return for that 5 year protection.
It can’t be completely circular. There is an end customer that will expect something for their money eventually. Right now it’s driven by huge amounts of debt, but you can’t be on that forever. At some point it unwinds