I mean, I understand and agree, and I'm pretty sure that Spotify Premium users are very skewed towards less mainstream tastes, so I agree it would be better for smaller artists and would probably change the power balance (well, if we forget that music labels exist).
But yeah, if as others pointed out you were to give 70% of your subscription cost to the artist that composed/performed the single track you listened this month, it would be very different.
At the end of the day, indies need to be on Spotify much more than Spotify needs them there. But for mainstream artists, it's the opposite; so the representatives of top-40 artists are the ones dictating the terms of how the system works for everyone, and unsurprisingly the system they've settled on is one that seems fair enough as long as you don't think too deeply about it, but ensures that the biggest slice of the pie goes to themselves.
