What about that did you not understand? You have a corrupt government, where no law gets passed without input from corporations via their lobbyists. They have this access because they pay bribes for the privilege. That's banana republic levels of corruption.
The reason this is relevant is because your FDA and EPA are both captured organisations, which is what allows Dupont and these other environmental terrorists to go about their business unhindered https://en.wikipedia.org/wiki/Regulatory_capture
When you use corruption in the sense of committing corrupt illegal acts, the US looks fairly clean. But if you define it in the general sense and include lobbying and sacrificing the public interest for private interests as corrupt, then in terms of the dollar values, US legislative systems are some of the most corrupt anywhere.