Except he's not up against the cap every year. It's a choice they make. While other teams manipulate the cap to get better and sign players (cough, cough division rival for example), the Jones don't use all the tools available to manipulate the cap because they love using their self inflicted cap constraints to justify why they are cheap in FA, etc.
you should read the rules on cap spending, each team has to spend about 92 % of each years cap or they get fined.
So while it is true they can keep a small %
(which is stealing from the players and nflpa should not have allowed this and I wonder why they did?? paid off I guess lol)
But most of it they HAVE TO SPEND IT . They can roll it over, which also should have more restrictions than it does.
So even out of the $ they have to spend, this season it would seem cowboys are way below what they should spend, but maybe they are paying off
past debts, like daks money owed and other money owed , to clear the way for more spending and more debt later on lol.
But the nflpa allowed all this cap nonsense to get out of control like it is.
The jones boys being the scrooges they are, probably are taking the max amount they can , but that still leaves plenty to spend.