I am not in Casey's head but I highly doubt it's about accountability. They are trying to win and Casey believes the best way to do that is to play the vets. Don't think there is anything more to it than that.
It's totally about winning. Coaches on 2 year deals are only concerned about one thing...their resumes.
"I don't lie. I willfully participate in a campaign of misinformation." - Fox Mulder