Neither companies nor governments fire 100% of their personnel unless a division is no longer needed. Governments, especially, have safeguards to ensure essential functions continue, so they don't simply stop functioning all of a sudden. From a bird's-eye view, a government is not much different from a company. They both allocate resources, manage personnel and strive for efficiency.

Not many safeguards for that under unitary executive theory which is likely to become case law soon. Aside from impeachment.

You realize the whole debate is about what different people consider "essential", right?