This has nothing to do with hierarchical government systems (whatever that is and in contrast to what else), but all about corruption and fraud by corporations.

This has nothing to do with hierarchical government systems (whatever that is and in contrast to what else), but all about corruption and fraud by corporations. Most corporations just as most humans are driven by their ethics and internal processes to act inside the law. And it isn't easy to abuse/subvert the FDA's approval and monitoring processes as anyone can attest that ever received a FDA warning letter. The ability of a government agency to withstand attempts of corruption in mind hinges more on the societies attitude towards corruption than the structure of the government organization.