Which matches how most corporations see their employees
They are Human Resources, to be consumed like any other resource
Also once, as an employee not a contractor, I was laid off and while I was given time to say some farewells to colleagues I was politely asked not to attempt to log in. I had worked there long enough that I received 6 months severance pay so I had time to get another job.
FWIW, All of my career has been in the American mid-west in "employment at will" states. I've never been asked to sign a contract as an normal employee.
I've actually seen such thing in Poland for a DB admin - the guy was asked to come to his manager's office where he was told that he's fired, and other admins used that time to change all the production DB passwords.
In Latin America getting laid off means being called to HR in the morning around 10:00am and getting told "you're being let go, please clean out your desk, fill in your boss on any pending work and finish your workday"
I've only seen one person escorted out of the building in the US way and that was because he was stealing corporate info.