Of course trying to ruin a company by bribing government officials to begin a witch hunt investigation is wrong if you stand to profit billions of dollars from that witch hunt.
Given the enormous profit he'll realize if he's successful in discrediting Herbalife, I can easily discount all of his other arguments as BS. He has no credibility in the matter if billions are at stake.
Note that I'm not defending Herbalife. Maybe they are scammy company that should be investigated and regulated more by the government - by that investigation shouldn't happen because a billionaire starts buying politicians, lobbyists and "non-profit" lapdog organizations.
US government already has established channel for complaining about unethical companies: Better Business Bureau. They don't need manufactured complaints.