Nice thing he said to Neil in the interview was that despite himself and Cornwell writing most of the music, ( though not all - Greenfield came up with the riff for Golden Brown, of a sorts ) JJ and HC didnt expect more cash as the writers, and they just distributed the money equally.
In JJ's eyes, he said the moment Dave and Jet added their own pieces, they had partly written the songs as well, and so they never had that in-band rucking when someone thinks they should get more quids than the others. Nice touch , i thought