Dear fellows:
(Just some thoughts, especially about the last post by Mr. Hinton.)
Let's assume an ideal situation: nobody else do any copy of anything. 100% respect to the copyrights. What do you think would happen in that situation? I'm quite sure about two directions: 1) lots of people would never start playing an instrument or learning music; 2) several composers would almost never have their music played. Is it interesting to anyone? I think not.
I live in Brazil, and the music publishers are pratically non-existant. Almost anything that you need you have to order from USA or Europe. Imagine a young player, that have a standard repertory such as a Beethoven Sonata, some Chopin, some Bach, a Debussy and some Bartok. With no more than 50 copies, he solves the problem in the same day he needs the scores for a couple of bucks. If he want to get "copyright correct", he must make an order. Assuming that the pieces are in volumes with another ones, he must buy 5 books. At US$ 15,00 by book, we're talking about US$ 75,00 plus charges. In a country where the basic salary is less than US$ 200,00 it's almost obscene, considering that it's just a student, not a professional. Multiply this by two or more repertories done in a year, times four or five years and we have a considerable amount of money involved.
To be very honest, I think that US$16,95 for a volume of Beethoven Sonatas edited by Dover (an example) it's not too much. The problem is the number of similar books that you must own to have a "basic library" of standard repertory.
The second question that arise concerns me directly. I'm very interested in new music and new composers, and in non-standard pieces and repertory. It's directly related to my performance practice, to my researches and to my professional activities. However, it's impossible sometimes to afford a number of editions by a composer you barely know, considering the fact that maybe you will invest your money for nothing. Let's take Boulez as an example.
How many pieces by him someone should know to have a thorough view of his work? 20, 30, 40? Of course I'm not talking only about piano music, but rather about examples of all his significant contributions. I don't have a total sum, but it will be probably very very high. Add to this some recordings (that in my country have a prohibitive price: US$ 35-40 each) and we have a winner...
Excuse me one more time with my multipliers, but beyond Boulez how many other fundamental composers are there? If we continue in this path, soon we'll reach the price of a car, of a house.
So, is there a possible solution? I think that, maybe, yes: a major, complete "strike". Nobody else buy a single page of sheet. Let's play public domain music and scores that are distributed legally for free over the internet (the British Music Information Centre is an example
https://www.bmic.co.uk/). Let's agree also that nobody will copy music irregularly.
The results? Some composers would not be played anymore until they are copyright free. Boulez, for instance. Yes, the publishers would go bankrupt. To the composers who want to be known and played, a very simple alternative: make a site, and give for free the music. I think that with the "orderings" (sorry, I don't know if it is the proper term), classes, performances, writings, and so on, the composers would worth their living in the very same way as today.
The question is: are you ready for this (or another active situation, such as that)? To be really honest, I think I'm not. It's very difficult to me conceive my world without Shostakovich, or Britten, or Reich, and I keep on paying US$ 40,00 a book or US$ 80,00 a double-CD. So, I think I should not complain about this, and wonder why did I write the above. Oh, well...

Best!