For example if you do 1 passport a day you can't have a dedicated person handling for example issues caused by dual nationalities. If you do 1000 a day you can have someone who just handles that and knows exactly how to do it.
A tech example would be that Google knows exactly how to get a worker a visa as they do it all the time and they're very efficient at it. A little startup might have no idea what they're doing and would be very inefficient at it.
The larger the org the harder it is to change in big ways (at least in my experience)
Even with organizational overhead.
Which is more efficient: Distributing thousands of books by pallet in large, predictable quantities of pallets, to a limited number of Amazon warehouses or sending a single box of 20 books to thousands of bookstores?