The clear and correct answer to that question is: Because these people are the paid clergy of our religion.
No surprise. Every religion or group has these individuals; it is necessary as these men keep us all in line with the Org's purpose.
Any CO that has left his post for whatever reason, has done a great disservice to himself. Where else will anyone find a better gig than that?! All expenses paid, new vehicle every 3 yrs, health insurance, plus plenty of cash courtesy of our faithful men worshipers.
GC