[mastax]

That gives me an idea for a copyright scheme.

By default any work is protected by copyright for 30 years.

After this point the copyright can be renewed for 10 year periods, with the cost increasing each time. Maybe the first extension costs $100, the second $10,000 the third $10,000,000 and so on. Put a cap at 7 extensions for a total of 100 years. Inflation makes all of this tricky, but if its all based off of a base price which is pegged to inflation and then the extensions are multiples of that it would work fine.

I'd argue that a longer monopoly on a work is more burdensome on society so it makes sense that it would cost more. Maybe they can reinvest the fees into the patent office or something.