Sure it might be work to set up the first subcompanies, but once you have that can't you just replace the company name in all the legal texts? Also I think large companies already do have tons of subcompanies, so I guess that cost already got paid?
> And simply faking many 149-employee LLCs while not having them actually be real entities is both unlikely to succeed
You do not need to fake it, you can just rent it?
(Also, I don't know about other countries but the IRS would have some questions for you after a few years of running a corp that doesn't appear to actually do anything).
I actually believed that having a ton of subcompanies, IS already how any larger company operates.
The reason _some_ (but certainly not all, or even the majority) large companies break up into subsidiaries is usually for liability purposes (so one mistake by one part of the conglomerate can't expose other parts to the full risk).