> Imagine working at a medical or financial company and having secretive 'old timer' permissions that basically backdoored the company's engineering processes

Have you heard about Kerviel? A trader that cost his banks a few billions of euros? He was able to do this because he could bypass reviews by his boss and the internal compliance team.

https://en.wikipedia.org/wiki/J%C3%A9r%C3%B4me_Kerviel

Edit: to be fair, it look like he took the blame for all the failings of the company