You're discussing a problem with the licencing price for a copyrighted work and suggesting that it being out of copyright is best for all parties. It would be more prudent to resolve the licencing issue so that artists can build upon others work and net the original artist more money.
The problem is that the music industry is too engrossed with its 'potential profits' that it can't find any 'actual profits'. They'll sell the licence to a 10 second segment of a song for a million dollars, which no one will buy and the record will get more obscure and less in demand just because the licencee could make huge money and their work is integral on that licence.
This could be resolved simply by saying the licence fee is $1 per unit sold per year. A song that sells a million copies in its first year maybe should have a licence fee of a million dollars for valid reasons. A 40 year old recording that shipped 10 units last month, definitely isn't worth a million, and $120 in a licence fee is probably the most money the artist or studio has seen from it in a long time.
I'm sorry, but the abolition of slavery took a civil war to resolve and it didn't have nearly as much money entangled in it as the copyright industry does. So unless The Pirate Bay launches an army, I don't think copyright is going anywhere. It would be more commendable to actually get the clauses exploited by corporations for (and sometimes against) their own gain fixed.