I said the structure can be discussed. There is no problem giving first number of years free to see if the IP is commercially viable. The aggressive progression (doubling every year) means that literally all IP is in public domain after a couple of decades.
A simpler solution is to start with a return to something resembling the original IP laws where one lost their rights within their own lifetime.... Theres a reason that was originally proposed, rather than lifetime protections, and why creators originally accepted it with glee... All parties need to remember those reasons, whether rights holder, state or consumer.
Just stop fighting for a broken concept and come up with something better.
Ed:typos