Below are some top results for the google search "FDA revolving door".

I mean, is this a serious question?

https://www.citizen.org/article/outrage-of-the-month-revolvi...

https://www.npr.org/sections/health-shots/2016/09/28/4956945...

https://www.sciencemag.org/news/2018/07/fda-s-revolving-door...