I will quote myself from [ http://news.ycombinator.com/item?id=2855835 ] here for another solution, one that actually can _easily_ go through government (except for the intense lobbying against it by whoever enjoys the current patent regime); you can read there for some discussion if it is interesting. Quoth myself (with minor editing):
Intellectual "Property Tax". Have everyone declare the value of their intellectual "property" (patents, copyrights, trademarks) - each and every item, for that year, on their tax return, and have them pay 1% of the value as "IP tax", per year.
Clarification: you can set a different value every year. The value may drop to zero because a competitor's patent solves the problem better; or it may go up because it becomes essential to something that becomes commonplace.
That amount is what one pays for a compulsory license or if successfully sued, and up to 3 times that for willful infringement, per year -- and no more. (But of course, a patent owner can always negotiate a lower payment, as is done with music recordings that have compulsory license agreements)
All of a sudden, everyone has an incentive to state a reasonable value for their patent. Copyright catalogs that are not being published (old music recordings, old books, old movies) would be assigned 0 value by copyright holder, to avoid tax - which means anyone can freely make a copy. If they believe -- at the end of the year -- that someone is making a profit at their expense, they can set the value as high as they want at the end of that year, pay the tax, and sue the profiteer.
Simple, elegant, and coffer filling.
edit: put missing link
edit: added clarification about setting value each year anew.