Restriction Of Ideas Is Silly
I don’t think ideas should be restricted. Can you imagine the first spear or the first bow and arrow being patented? It’s ridiculous - copying other’s ideas, other’s behaviour, other’s way of speaking, it’s what we do! Somehow we’ve be tricked into putting made up restrictions on that behaviour for the benefit of a relatively small few.
I do think some rules need to exist. Thus, you shouldn’t be allowed to sell a band’s performance of a song. However, you should be allowed to do your own performance (copying lyrics and notes) and sell that. If you can make a Ford Fiesta cheaper or better than Ford, then why can’t you? Because Ford came up with the design first?
Contrary to the popularly held belief of progress being stalled, it would probably be sped up - no restrictions on the copying of ideas, no lawyers stopping someone with a slightly improved tablet selling it. The world wants new, better things and as long as money changes hands for those things, people will keep improving items and doing research, even if they can’t then restrict others from benefiting from it also. If I write an amazing program or a fantastic website and someone else wants to copy the look and functionality and thinks they can sell, maintain and run it better than me - then good luck to them!
The only thing that should be protected is a name - so you know from who you are buying something with, say, Sony written on it, that you really are getting the Sony produced version of that product. There would be some details to sort out for novels and news stories, and even performances of songs by another band - they should clearly have an original source attribute.