How much is that worth to society? How much money should you make from that?
Consider an elementary teacher tasked with teaching 28 children to read and guiding them to becoming active participants in democracy rather than repeat offenders. $50k/yr. Compare a state university computer science professor who will teach dozens of new jacks this year how to measure and optimize algorithms-- setting them up for a life of full time employment while all their friends tread in the sea of shit and unemployment around them. $90k/yr. Consider a bus driver, a construction worker, a civil engineer, anyone who didnt have a chance to finish high school or College and still goes to work every day. Or those who went to ivy league colleges and resisted the urge to go into finance. Productive people.
We are all productive and we all add value, and we are underpaid. Our kids will have varying access to good education. We have less access to inferior healthcare. We spend too much time at work and not enough time with our kids. The lowest of us live in poverty and violence, relegated to feeding our children less healthy, life shortening diets. And thats just in the U.S., one of the wealthiest states on the planet.
Now how much is that song you sang worth?
Artists should be about art. If you dont like the fact that Apple wants you to be their slave, then distribute your music yourself. If people dont want to pay for your music, then keep doing what you want to do and starve or start doing what they want you to do and make money. But dont try to be about the art and say the faceless evil corporation should pay you more. It is disrespectful to the productive workers of the world.