Again, you're conflating supply and demand with contribution.
What you need to look at is impact of decisions. If the CEO makes a wrong decision the entire company can go down. If a worker makes a wrong decision it's much less of an issue.
I don't see any particular justification for "What you need to look at is impact of decisions." Why is "impact of decisions" a more important criterion than "who does the work."
Unless the employee gets his hand caught in a machine, the press jumps all over it and stocks plummet 5%.