Another interesting thought. "Dehumanization of people" sounds like the title of a dissertation, it has so much depth you could talk about.
My first thought is, "can you even dehumanize someone" because I've never recognized this feeling as having "the features of humanity denied to me" by someone and properly identified it.
Looking back I have for sure been dehumanized at work so many times I can't get close to counting them. And I don't think that anyone could go home to their parents house and have their mom be a totally different person without being confused at least.
It is only recently that I would consider my co-workers as not interchangeable. Lower paid high turn over positions you just don't get attached to people, or at least I don't. People come and go so fast, but there are some that I only worked with for a few weeks that I remember to this day. Never considered that value before.