There is no one to appeal to because as long as the money keeps flowing, no one above is allowed to do anything. They could be burying babies in the basement, but as long as the money continued upwards to the Sea Org, everything is fine. This tunnel vision management, total focus on the goal whatever the means, has historically always been the modus operandi of ruthless and successful dictatorships. Thus, if you are good at stabbing your associates in the back, planting evidence, falsifying statistics, blowing your own horn, and maintaining good personal PR despite a lack of real production, you will do well on staff, but that is later. An FSM is just like the former category, except they are authorized to sign people up on behalf of the Org.
Missions are tiny orgs.
They are only allowed to deliver up through Grade IV rundowns. After 1982 however all autonomy was squeezed out by Miscavage and his goons. Most of them were stupidly thinking L. Ron Hubbard would never have let this happen and was going to correct it all. What they refused to believe was that L. Ron Hubbard was the person who ordered it done. That is the price of blind, stupid obedience.