Simple, He overules the coach.
You guys are underselling the role of the list manager in football at most clubs. & most certainly ours.
The list manager heads up a list management committee. He also has the final say on all list management decisions. Whether they be should be how many players be kept on, & which one's whether that be for reasons, of age, type or class. How many draft picks we should take, & which age & type we look for.
Ask yourselves this, how can the coach be making decisions on how many players we keep. He doesn't have the knowledge of the quality of the draft & likely class of the picks we could get in to replace them. Francis Jackson knows this & reports it through to CC. Likewise the coach reports through to CC where his players stand on field which one's he doesn't see a future for or whoch players he may like to get in as a trade. He then makes what should be an informed impartial decision on whats best for the club going forward. In our case it should be for the long term & should have been last year as well. Which is argueable. In any case no-one else but CC has responsibility for any list decision.
Chris Pelchen was the first to have this role & power. He made the call last year that even though they were premiers the draft was deep & went with a lot of youth. With the information he's been given from his staff this year he obviously feels thats not the case so they targetted experienced players. Only time will tell if he is right.
Some other clubs have more power to the coach. i.e Collingwood (Though Hine now has a lot more say) Essendon with Sheedy (which hurt them later on), Paul Roos & Voss now.
But like us most clubs have an overarching list manager like Dodoro, Harrington, Pelchen, Fantasia that should see the bigger picture & be have more information to make a better long term decision. But with that comes responsibility & the blowtorch whether good or bad.