About that: Currently (until I get enough evidence/data to change my opinion) I subscribe to an amalgamation of John Perkins' and Jerry Mander's point of view on Corporations: They should not be bigger than their locality, also expressed as smaller is better.
As soon as their operations can no longer be felt in the same geographical area as any other part of said corporation, they have gotten too big and need to be broken back up again.
When corporations were smaller, it seemed there was better control and oversight. If they fouled their nests, it was eventually (preferably rapidly, but not always the case) obvious in the same locality and could be subjected to local response/censure, until wrongs were made right or they were closed.
Overall, more localized government would seem to also provide for better "vote with your feet:" If one does not like the local consensus, one may move to another locality, possibly not that far away from the first, where the environs are more to one's liking.
I am purposely using subjective language such as "seems" since I know I must not be as smart as others in these arenas. But so far, the ideas above have my support/backing/agreement.
fwiw.