The juxtaposition of people and mannequins is quite a popular trope. After all, there's a lot of symbolism as well as parallelism when you put a real person next to a plastic human-shape object. We've seen it many times in many places, not only photography of course, and mannequins were even used to scare us in one of the episodes of Doctor Who, as I remember now. But anyway, it's not my point.
The point, however, is that I'm guilty of using that trope too, and in case of this photo life just threw this chance at me to take. Funny, though, that I've posted another photo of people and these same mannequins some time ago. In both pictures, the people are kinda strange looking in some either work or just dirty clothes, while the mannequins are all slick, clean and finely dressed. It's like as if they look at us reproachfully and say: "Hey, get yourself some clean dress already!"