Coordination consumes a larger and larger amount of employee time to the point that, in the absolute largest organizations, the vast majority of employee time is internal coordination vs. actual improvement/selling of the customer offering.
So if you go from 100 employees to 1,000 employees, they can MAYBE do 4X the work. Not 10X like you'd think. And this effect gets even worse as you scale further.
So if an AI can do 10X more labor in a human day, and can coordinate instantaneously via a central context ledger (say a git repo), it doesn't just create 10X gains in productivity for large orgs. It creates a multiple of that 10X due to also removing the human coordination overhead.