This is probably going to end up being a controversial opinion, but I just don't think music is worth that much anymore (fiscally speaking). Sure, there was a time when being popular meant signing a contract-- it was the only way to distribute your music on a large scale. Radio and physical copies were the only way to hear music, period. But these days with the internet and the right software practically anyone can c…
Give me all of the top music software in the world and I won't be able to create anything worth listening to. Your statement is kind of like saying since word processing software and electronic distribution are widely available, books really aren't worth the price tag. It's the creativity and hard work that goes into books and music that makes it worth the price--not the cost of the distribution medium.
I'm not saying they're overpaid, but it is an interesting economic observation that the supply side of the market might be oversaturated relative to the demand.