This stuff is like listening to two sides in a divorce, you know each side is going to paint it according to their point of view. For all we know, some of the members of A7X might have been originally excited and wanted MP on the team but when it came down to brass tacks, they realized his wealth of experience on the business side and what he would likely demand might change the band dynamic. I'm sure MP probably saw a lot of things in their operation where he had suggestions from his 30 years in the business.
As for his wealth, the dude outworks everybody, period. Its hard to not imagine some professional jealousy in all of the parties based on his ability to keep so many balls successfully in the air. Even so, this isn't Wall Street and he isn't Hedge Fund rich, probably just financially comfortable with good financial advisors/lawyers.