There is only one condition in which we can imagine managers not needing subordinates, and masters not needing slaves. This condition would be that each (inanimate) instrument could do its own work.
AristotleThe life of children, as much as that of intemperate men, is wholly governed by their desires.
AristotleMy lectures are published and not published; they will be intelligible to those who heard them, and to none beside.
Aristotle