Most music fans today are aware there’s a long-running argument about whether the writers of the songs we love are fairly compensated for the profits made out of them. The internet brought the argument into the light, but it wasn’t really new. Since the era of recorded music began – and actually, long before that, when people bought sheet music rather than albums – the disagreement has raged on. It’s often assumed that those who reach certain heady heights will be more immune from being ripped off, if only because they can command bigger percentages and hire better lawyers. But...