For those curious, this is mostly a result of Disney. http://www.washingtonpost.com/blogs/the-switch/wp/2013/10/25...
I can't really fault Disney for this. Mickey Mouse is one of the most recognizable symbols/brands on earth. The difference between Disney and McDonalds and Coca Cola is that there isn't an expectation we all get unfettered access to use the Golden Arches or the Coke logo. Disney is still making new IP with Mickey Mouse; why should they be expected to give up their rights to their most recognizable character that they…
Then the average lifetime of copyright monopolies should be around 15 years, which is actually about what it was when copyright laws were first created (the average would be dragged down a lot by people who wouldn't care about stuff they made in a week enough to pay $1,000 5 years later, but most of the "real works" that would be worth it, will probably have it for around 30 years or so.
We see it with books that after 10 years most of them are basically dead, and nobody cares about them anymore (can't find that link right now, but some of you probably know what I'm referring to). There are some "Mickeys" here and there that are relevant 100 years later under copyright, but it's more like 1 in a million works. The rest is abandoned - but it still retains the copyright on it so nobody can re-use it to improve the culture of the society (even if it just means having a company like Google find all the old books and digitize them, something they've barely won, and is actually getting appealed right now). I think that's just wrong.
[1] - http://www.techdirt.com/articles/20130503/17414322946/discus...