The next highest paid corner got his extension before the 2019 season and that was Xavien Howard and Howard did not reach FA. Here are the top corners in the NFL
Stephen Gilmore - got his contract a couple years ago, was not a top corner at the time
Ramsey - on his fifth year option
Marcus Peters - Great 2019 season, but was seen as a ballhawk that got burned often and attitude problems
Richard Sherman - Aging, wasn't as good when he left Seahawks
Casey Hayward Jr. - Was a decent player and injury prone for the GB, Chargers got a good deal
Adoree Jackson - Still on a rookie contract
The long standing best corners in the league have been locked up for a few years now or are on rookie contracts. Cornerbacks don't "break the bank".
https://overthecap.com/position/cornerback/
Go look when most of them got their contracts. The market goes up. All of those players, if they hit FA, would be getting what Jones is expected to get OR MORE.