Killing Spotify would be terrible.
New musicians want their work out there....without Spotify(or similar) it will be back to just blasting out your music for free online everywhere so you can get bug.
Spotify at least gives them some revenue while they increase their fandom.
If Spotify doesn't compromise, killing it would be the only solution, but this union doesn't have the power to do that initially. But this will never work because you have a infinite stream of new musicians wanting to be listen without receiving money for that.