You get an exclusive monopoly and profit for twenty years, that seems long enough. Expecting the gravy train to run for the rest of your life, if not longer, is excessive. And I disagree with the premise that all human creative effort would cease were that to change.
>You want to re-write the rules because 'it doesn't work' makes no sense.
I don't know why you're quoting an argument I didn't make, or why you wasted the bulk of your comment rebutting it.
Secondly and this is where the current system fails the hardest is that you have to preserve culture.
Most of the older niche content is actually preserved by piracy right now and would be gone otherwise. There's no way to preserve content in the current model, content is just created and then thrown away.