If you now think that all business divisions have more work to perform due to scale, and that for development, you want to have more parallel streams of work, this should give you an approximate idea of what an order of magnitude larger company uses 10k people for.
you can start to understand how crucial pricing could be to a large organization that they could dedicate a person(and a whole team underneath!) solely to pricing goods and services.
EDIT: At the same time you wonder if pretty much all jobs follow Parkinson's role: job filling up to fill up the time.
You have a whole team of talented front end guys at Youtube (or Gmail or Dropbox or ..) and front-end will change and features will be added or dropped because well something needs to be done.
So wouldn't this same principle apply to other jobs? Pricing Manager would keep fiddling with prices if there is nothing else to do. Obviously there would be justifications to higher ups.
If you now think that all business divisions have more work to perform due to scale, and that for development, you want to have more parallel streams of work, this should give you an approximate idea of what an order of magnitude larger company uses 10k people for.