Years ago I worked for a large pharma company and lived in a cubicle. Upon a (mostly meaningless) promotion I was authorized a larger cubicle. But the only available ones were with window access, for which I was not authorized. So, the corp blocked the window with plywood ...
And my last boss there was pointy-haired, too. Still is, but the hair is white.
I would have said the following in Dilbert's shoes.
well if you don't have a cubical that is three inches bigger, perhaps you might have a spare office you can use until you get one made? But we both know you'll never get around to making the larger cubical... so can I instead just have the office? it's less work for both of us, especially you.