That's laughable. At least make the figure believable. Why would a man who is proud to pay "only the taxes he legally owes and not a penny more" have paid a full 7 percentage points higher for a span of a decade? That makes zero sense. Not believing it until I see documentation. An not from an organization that would make any statement provided they were paid for it.
Whoever spewed that lie at PwC is a complete idiot. Believability is your first asset.