ok, let's look:
Last year the Vikings were competitive with Kase Keenum making close to nothing. That was probably a factor in their success.
The 49ers had various people on the cheap, and now they are paying Garoppolo a ton, so jury is out.
Lions paying Stafford a ton and basically always lucky to maybe squeak into playoffs and quickly eliminated, never a threat.
Raiders paying a ton and they are not really competitive.
Saints are competitive with Brees. He did just sign a team friendly contract. Im not sure if your examples proves your or my case?
But lets look at last six Superbowl winners and the QBs. As you can see, the majority of teams in these games were paying QBs less than the league average, and any rookie deals:
XLVII Feb. 3, 2013 Mercedes-Benz Superdome (New Orleans) Baltimore Ravens 34, San Francisco 49ers 31 - Flacco on a cheap deal over Kap on rookie deal
XLVIII Feb. 2, 2014 MetLife Stadium (East Rutherford, N.J.) Seattle Seahawks 43, Denver Broncos 8 - Wilson on rookie deal
XLIX Feb. 1, 2015 University of Phoenix Stadium (Glendale, Ariz.) New England Patriots 28, Seattle Seahawks 24 - Brady on friendly deal over Wilson again on rookie deal
50 Feb. 7, 2016 Levi's Stadium (Santa Clara, Calif.) Denver Broncos 24, Carolina Panthers 10 - Manning over Cam. I am uncertain but think both QBs were not paid much.
LI Feb. 5, 2017 NRG Stadium (Houston) New England Patriots 34, Atlanta Falcons 28 - Brady again on friendly deal
LII Feb. 4, 2018 U.S. Bank Stadium (Minneapolis) Philadelphia Eagles 41, New England Patriots 33 - Wentz on rookie deal
GO RAMS