I think the thing a lot of folks don't understand about NFL owners i(and super rich folks in general) is that their value is not how much money they have in the bank at the moment but in the amount of future earnings potential they have. Right now an NFL franchise is still a golden goose- its like printing money. And the hoary old adage "it takes money to make money" still applies....
I would guarantee Jerry Jones does not have as much "cash on hand" as you'd think for a multi-billionaire (still tons for common folks such as you and I but bankers and high investors look at things differently than us peons). A ton of it is invested with a return of some sort expected- he doesn't sleep on piles of $100 bills.
A billionaire needs to be as cash poor as he can be able in order to avoid taxes as much as possible. And the interest and investment income needs to be re-plowed into investments that grow more than the taxes payed on it. Its a different world from the average person (although some of the same principles apply that sadly, too many folks ignore).
Aaron Rodgers getting paid is a good thing- maybe his arrogance (he and some other starters are not traveling in the final PS game to be with his team) bodes well for our week 1 game. Here's hoping the Bears can start the Packers out at 0-1 in their "Centennial" season