Given the fact that all of the band members are doing different every day jobs in the video, I take the emptiness machine to refer to the world, or the corporate world, or at the very least the expectations put on us by society.
I also thought it could be referring to the Internet, in the sense where people on the Internet want to get famous and be liked by everyone, and when they finally reach that point of fame and status, they realize that it was empty because not only did they lose themselves in order to impress the world (given themselves fully up to criticism, slander, and hyperanalysis of their character, etc.) but also they have no fulfillment in the end, thus, emptiness.
As far as the working world idea though, that one is a little bit less deep I would say. Maybe it’s about not being fulfilled by the mundane tasks that society presses on you, get a job, go to school, have 2 1/2 kids, that sort of thing.
But I would argue that the fame one is probably more impactful. I’m sure this can be interpreted in a lot of different ways, which is what LP loves to do with their songwriting.