Here's a list of current QB salaries, top and bottom so you can see where Dak fits in. Obviously Jerry is going to do what he wants but its a good visual...
Aaron Rogers134,000,000$33,500,000
Matt Ryan$150,000,000$30,000,000
Kirk Cousins$84,000,000$28,000,000
Jimmy Garoppolo$137,500,000$27,500,000
Matt Stafford$135,000,000$27,000,000
Derek Carr$125,025,000$25,005,000
Drew Brees$50,000,000$25,000,000
Andrew Luck$122,970,000$24,594,000
Alex Smith$94,000,000$23,500,000
Joe Flacco$66,400,000$22,133,333
Russell Wilson$87,600,000$21,900,000
Ben Roethlisberger$87,400,000$21,850,000
Eli Manning$84,000,000$21,000,000
Philip Rivers$83,250,000$20,812,500
Cam Newton$103,800,000$20,760,000
Tom Brady$41,000,000$20,500,000
Ryan Tannehill$77,000,000$19,250,000
Case Keenum$36,000,000$18,000,000
Blake Bortles$34,947,000$17,483,500
Andy Dalton$96,000,000$16,000,000
Tyrod Taylor$30,500,000$15,250,000
Nick Foles$29,000,000$14,500,000
Josh McCown$10,000,000$10,000,000
Baker Mayfield$32,682,980$8,170,745
Sam Darnold$30,247,694$7,561,924
Mitchell Trubisky$29,032,436$7,258,109
Jared Goff$27,937,672$6,984,418
Carson Wentz$26,676,338$6,669,085
Jameis Winston$25,351,277$6,337,819
Marcus Mariota$24,213,974$6,053,494
Teddy Bridgewater$6,000,000$6,000,000
Josh Allen$21,183,034$5,295,759
Chase Daniel$10,000,000$5,000,000
Josh Rosen$17,597,760$4,399,440
Patrick Mahomes$16,425,962$4,106,491
AJ McCarron$8,100,000$4,050,000
Matt Schaub$8,000,000$4,000,000
Mike Glennon$8,000,000$4,000,000
Deshaun Watson$13,854,482$3,463,621
Chad Henne$6,700,000$3,350,000
Ryan Fitzpatrick$3,300,000$3,300,000
Drew Stanton$6,500,000$3,250,000
Colt McCoy$6,500,000$3,250,000
Lamar Jackson$9,471,652$2,367,913
Blaine Gabbert$4,000,000$2,000,000
Brian Hoyer$4,815,000$1,605,000
Ryan Griffin$2,550,000$1,275,000
DeShone Kizer$4,948,412$1,237,103
Matt Cassel$1,105,000$1,105,000
Robert Griffin III$1,100,000$1,100,000
Derek Anderson$1,073,530$1,073,530
Geno Smith$1,000,000$1,000,000
Mason Rudolph$3,921,866$980,467
Josh Johnson$915,000$915,000
Mark Sanchez$915,000$915,000
Joe Webb$915,000$915,000
C.J. Beathard$3,528,646$882,162
David Fales$880,000$880,000
Brock Osweiler$880,000$880,000
Jacoby Brissett$3,410,832$852,708
Cody Kessler$3,389,082$847,271
Sean Mannion$3,250,896$812,724
Kyle Lauletta$3,167,700$791,925
Brandon Weeden$790,000$790,000
Matt Barkley$790,000$790,000
Joshua Dobbs$2,959,124$739,781
Tyler Bray$705,000$705,000
Tom Savage$705,000$705,000
Dak Prescott$2,723,392$680,848
Mike White$2,677,556$669,389
Taylor Heinicke$1,320,000$660,000
Luke Falk$2,608,832$652,208
Kevin Hogan$630,000$630,000
Brett Hundley$2,503,632$625,908
Jeff Driskel$2,452,540$613,135
Nate Sudfeld$1,170,000$585,000
Trevor Siemian$2,332,784$583,196
Tim Boyle$1,716,000$572,000
Cooper Rush$1,670,000$556,667
Taysom Hill$1,670,000$556,667
Davis Webb$555,000$555,000
Kyle Sloter$1,665,000$555,000
Alex Tanney$555,000$555,000
Nick Mullens$1,050,000$525,000
Brad Kaaya$1,020,000$510,000
Jake Rudock$340,000$340,000
Connor Cook$129,200$129,200
Phillip Walker$129,200$129,200
Brandon Allen$129,200$129,200
J.T. Barrett$129,200$129,200
Alex McGough$129,200$129,200
Cardale Jones$129,200$129,200
Tanner Lee$129,200$129,200
Chase Litton$129,200$129,200
Danny Etling$129,200$129,200
Garrett Grayson$129,200$129,200
Chad Kanoff$129,200$129,200
Kyle Allen$129,200$129,200
Kurt Benkert$129,200$