One of the primary uses of the EPA has been to make Washington insiders rich. And they don't care that the EPA was beyond they charter.
Scenario:
Suddenly many politicians and insiders invest in a "Green Energy" company that you and I have never heard of. Even if we had heard of it, these investments are not available to the general public.
Soon after, the EPA "coincidentally," passes regulation and/or press release which causes this unknown company's stock to soar. Sometimes these companies are even propped up by federal funding.
Then these "savvy" Washington investors seem to know when to divest just before these, once stable, companies go right out of business. It happens over and over.
You and I would go to jail for this, that's why Congress voted themselves exempt from insider trading laws.
https://www.washingtonpost.com/news/the-fix/wp/2014/10/22/so-just-how-rich-is-congress-richer-than-you/?utm_term=.9c96e92a9109