The biggest myth in pro sports(or top 10) is that once you pay the QB you can't pay anyone else and that's why they suck
The Giants gave Eli manning an 85 million dollar extension last year and went on an all time spending spree this offseason.
The saints gave Drew Brees 100 mill in 2012 then gave Jimmy Graham the largest deal ever given to TE, and Jarius Byrd the largest ever given to a safety
The Falcons signed Matt Ryan to a 100 million dollar deal in 2013 then signed the number one center and Sanu to a 5 year deal in free agency.
Peyton got a 96 million dollar deal for Denver and they went stupid in free agency in 2014. It worked out for them in 2015 though with the SB win
Teams are garbage because their drafts have been horrible for years, not because of the salary of the QBs.