Being a musical artist is not easy business for pretty much every artists except for a few outliers, though we do appreciate and consume music.
If you made a graph with the x axis being percentile and the y axis being the amount of money made, on the far right side of the x axis there would be a huge spike where a tiny fraction are making a fortune. (I think) I'd prefer the spike to be smoothed out.
What's interesting is that Apple/Google/Pandora/Spotify could test this. Adjust the distribution curve and then see how demand for music services changes over the years. With more artists able to live as pros, would music as a whole be more in demand? I'd venture that music as a whole would be more in demand due to increasing the number of (quality) trials in the musical search space. And if you flatten it out too much, you would reduce the motivation to continue to try to "hit it big", so you're looking to optimize the distribution curve.