Imagine if the company starts promoting within bases and making you operate with a based Captain that's 10 years junior to you
Not quite that scenario, but CX did hire DEC's for the freighter (no money in freight) and tried to make FO's many many years senior to the "flotsam and jetsam" fly with them.
The resultant "PRA's" caused a rethink of RP's and CX FO's weren't obliged to fly with them. Callouts were refused (legally) and the whole freighter only crew thing turned into a dog's breakfast.