"Last I checked, no artists are selling MP3s to consumers on a per stream royalty basis. "
Still, every time the record is aired in public (bars etc), royalties are paid. And even when selling to consumers, they'll sell a vinyl disk, then a cassette, then a cd, then an .mp3, then a .wtf... and every time, it's the same damn recording, and if you try doing the format shifting yourself, they'd like nothing more than throwing you in jail.
And let's be honest: most record companies and artists ALREADY make more money from merchandise than they make on recordings, the same way comic book publishers make more money from toys than from actual comic books. This myth of the starving artist being robbed of revenue by downloaders is just that, a myth.
Now, where's that cassette that killed music back in the 80s...
Should the plumber charge $0.05 + a small profit or should the plumber charge $0.05 + a large profit to offset the cost of developing the robot? Once the robot is available, it costs the plumber basically nothing to fix your problem, but it took the plumber a sizeable investment to create the robot in the first place.
And I've already wrapped my head around the fact that I'm going to have to be agile to keep figuring out new ways to earn my own paycheque, so that I can afford that $1 repair.