Today’s movie: They Live

I thought you understood. It's business, that's all it is.

I thought you understood. It’s business, that’s all it is.

I’ve been confronted to a lot of 80s synth music lately so this prompted me to watch some John Carpenter classic, and here it is directly from 1988, They Live. Full of catchy lines, is it an allegory, a fantasy or just a documentary?