Managed switch or linksys router how the hell is it so easy to push that much money around even if I work in that "room" and give you access to my computer for

Managed switch or linksys router how the hell is it so easy to push that much money around even if I work in that "room" and give you access to my computer for a hour there should have been some software to notice somethings going on. The switch is could have been a $10,000 switch and it still sounds to easy. I'd say inside job unless scanning the up range screamed out the company name and some easy vulnerabilities/old software versions which could have also been the case.