Technology and globalization have "cheapened the middle" of almost every industry. Get used to it.
The most popular performers will do well, and even get bigger access to global markets, but the middle-ground is being hollowed out because the Internet gives consumers more choice and more access to old-but-good material. And, many amateurs give out works for free either to promote them or because money is not their goal. This gives for-profit performers competition who work for peanuts.
Concert, venue, wedding, and bar performances are probably the best source of music wages, not recordings.
The rich get richer, the rest stagnate. Welcome to the club!