I have thought about a model where if you want your IP protected by government, you can register your IP and pay an ever increasing annual fee for the protection. Say, first year the fee is 100 dollars and doubles every year, so that around 25 years you would be paying more than a billion dollars.
At any time you have the option to quit paying and give your IP to public domain. Also, any IP not in the registry would automatically be in the public domain. This would solve the issue about orphan works and give some benefit from the IP to the society that enforces the IP.
This would put many of the most vulnerable artists at a huge disadvantage. A $100 registration fee per work is practically a rounding error to a major media corporation, but it's prohibitive to a struggling band or a fine art student.
At any time you have the option to quit paying and give your IP to public domain. Also, any IP not in the registry would automatically be in the public domain. This would solve the issue about orphan works and give some benefit from the IP to the society that enforces the IP.