Paul certainly is the richest "musician," however you want to define that, but he didn't get that way through being a musician. Huge chunks of his fortune come from 1) MPL, his music publishing outfit that owns, like, everything except his own Beatles tunes, and 2) his current wife's huge $200 million fortune. Writing and performing is not the way to really become mega-wealthy, though you might think otherwise. The two richest men in the music business, Clive Calder ("Zoomba") and Sir Cameron Mackintosh ("Les Miz"), didn't get to the top of the list through their performances or songwriting, and neither did Paul. He would be much further down the list if all he had to go on was his Beatles, Wings and solo artist pay. Of course, he'd hardly be on Beggar's Row, either.