I have different kind of problem, but related to this one: Spotify is partly owned by major labels, so when I pay those 9.99€ I help those guys survive, whereas I'd prefer them to go bankrupt and have a totally different model of music industry, as I find the old/current one being seriously broken.
As for the artists, I don't know, Spotify (and Internet in general) helps all those little bands to get some listeners, as discovering new artists is much easier now thanks to technology (20 years ago it all depended on labels, MTV and music press). As for the "big" artists? I don't think they should have been earning as much as they were during the heydays of music industry, nor do I feel like helping Mick Jagger or Bono funding a new yach or private jet.