Whatever Dak is paid has absolutely nothing to do with Jerry Jones's profit margin. Jerry does not lose money by paying more for Dak. He has to either use the entire salary cap or move any remaining balance to another year,
In any case, the value of the franchise is somewhere near 10 billion dollars. If Dak was to sign a 240 million 4 year contract, then it's total would be worth 3% of the present value of the franchise, which is increasing almost exponentially.
The real problem its the salary cap which is like a large pie. There is only so much pie and the larger the slice to one player, the smaller the slice for others.
Players are not greedy but best believe their agents are. Yes, the agents are going to maximize because they can't see the big picture. They can't see that their demands limit their client's opportunity to obtain the other important aspect of their career besides wealth and that is winning.
The more Dak is paid, the less the Cowboys can afford to place talented pieces around him. That means he will have less tools to work with in order to win.
They also fail to realize that championships are money in the bank for that players future. On average, we know, instinctively, that champions earn more money post-career. They get more offers in the entertainment industry and in advertising. They get better opportunities.
What company wouldn't want to inspire their staff with the addition of a qualified former NFL Super Bowl champion, even if he was only on special teams for a few seasons?
Another aspect is the reaction of their teammates. They all say the things they are supposed to, they are happy for him, etc, However, some other player or players will now get offered less on their next contract or possibly cut to make cap room for the increase in his teammates new contract. How can there not be even the smallest sense of resentment and how does that affect their relationship on the field?
So, these players are not greedy, they are simply shortsighted. I really wouldn't want a player on my team that is willing to reduce his team's chance at success to make the maximum he can get. Then again, i remember when players used to share apartments and had part-time summer jobs.
Players are being paid too much, owners are making far, far too much, and fans shouldn't be paying anywhere near this much for a sports team that their taxes help support.