Yes, but you know how these things go, even wealthy people get used to a certain lifestyle which needs to be funded, multiple houses, state of the art recording studio etc.
You know if you've spent any time with people in this category. More often than not it's to demonstrate how continuingly successful you are to your peers.
McCartney never needs to tour or release another record. He loves filling huge stadiums however, and he will be absolutely beaming from ear to ear that the new single is number one. It is more about bragging rights than filling the bank balance. How does an 80 year old spend $1.2 billion?
You can bet if he bumps into Paul Simon or Elton John he'll mention the number one single however.
Mark would want to find things for Guy to do. I'm sure John is very happy to top up his bank accounts too, although by normal standards John never needs to work again either.