They are required to spend money (thankfully) by the league, so, they have spent it on some guys...but, they don't spend it on GMs or Coaches, and, they don't spend it in pursuit of players, or, retaining their own more often than not.
They spend lavishly on their own offices, but, they don't pay for quality coaching staffs...they don't spend on a QB (which is how they ended up with Dalton)...they don't sign top free agents (yes, to your point, they spent money on some guys, but, they did not spend it on the best guys...that said, even if they did, with the incompetence of ownership, maybe GMs/Coaches/Players would not come anyway...maybe that is even an obstacle at the moment, we will see).
Here is an idea...and hardly a novel one...in that they fully admit that they essentially know little about football and next to nothing about running a team, spend some money on a quality individual to be the President of Football Operations, who in turn would get to lead the search for the next GM and HC, rather than try to continue to save a buck and do it with the same two boneheads leading the search that have led it in the past, and, stand to lead it again in about 4/5 years.