Copyright expiration IS the end goal. And, at least constitutionally, the goal of copyright was to encourage creation of works, not to extract every last cent.

Copyright expiration IS the end goal. And, at least constitutionally, the goal of copyright was to encourage creation of works, not to extract every last cent. Expiration isn't an afterthought of the process. Without copyright, everything would be in public domain. So public domain is essentially the default. Copyright was created to allow the artist to make some money, for a time, before returning the work to the public domain, so that others can build of it. Giving an entity, forever, to enjoy the Monopoly is just absurd, and unconstitutional. Five years is to short, but 75 or 90 is to long. Based on the fact that most books on Amazon are less than 25 years, I think 25 is a good term length.