Hmmm, the most reveling quote is that "they had enough money that they didn't have to do anything". I'm not saying that you have to be poor to be creative (Dostoyevski came close to saying exactly that), but wealth seems to have been poison to the band's passion in this case and many others.
I'm glad the fab four delivered Sgt Pepper, the white album, Abbey Road and Let It Be, all after money problems were a distant memory.