From my dealings with Dr Discrepancy aka J Aleck I believe he stays in CAsA because being such a legal wizard, the framework of the establishment would fall apart if he wasn’t there to continually hold it together with his vast knowledge.
He,s one of those people with the “I’m indispensable “mindset.
And what a fabulously rewarding trough it is.
Sad thing is if he popped his clogs tomorrow CAsA and the world would just roll on as always.