It could be that McC saw the PL gravy train looming and decided to force the issue by offering funds in the knowledge that the prince would not match them and he could force a boardroom battle that would see the prince departing thus clearing the way for McC to exploit the possibility of a PL return as sole driver.
If it's the prince who didn't play ball when he had an opportunity to bail out why is he hanging around? Deal to disappear not good enough?