My dad had a private office, and his secretary had one too. Both offices looked out over a lake, and were large rooms. My dad had an informal sofa area by the window, and the secretary's office was slightly less grand but still had plenty of space. He earned about the same as me inflation adjusted. His secretary obviously far less, though they both got a gold-plated final salary pension on top.

What are the chances of that happening today for anyone not in the C-suite?

I never had a private office until I started working from home. My pension comes out of my salary and all the risk of markets falling etc falls on my shoulders.