Corporations of global significance are ultimately directed by a small group that controls/manages global capital. The network was studied and mapped in detail back in 2011, when the media would still publish findings like this:
https://blogs.scientificamerican.com/observations/ownership-ties-among-global-corporations-strangely-resemble-a-bow-tie/
Consolidation of control has only advanced during the last decade.
And if a psychopath could conceive a plan under which poisoned food or poisoned environment would result in long term dependency on the products of Big Pharma, he would (if part of the small group of ultimate power brokers) possess the ability to control both cause and effect.