That $9M is an arbitrary number, because some teams are stupid enough to pay that much explains why there are teams like the Phillies stuck at .500 despite spending up to the cap, year after year.
The two ways to build a winner in the FA era is cheap WAR from younger players, but those soon dissipate as players get money in arbitration and approach FA, and to buy WAR at a discount, whether FAs or extending your own players.
If you have a great farm system that consistently churns out cheap WAR, you can afford an overpay or two, but how many Phillies players have been cheap WAR? Nola, Eflin when healthy, Hoskins for a year, who else?
Which means the ONLY way the Phillies can compete is by purchasing WAR on the cheap.
If Schwarber is 4+ WAR, it's a great move, if he's 2 WAR it's more of the same.