I think the relation seems plausible on the surface because the same groups that were pro-brexit were the ones who are pro-trump, the /pol/-lurking, redpill types for example. I'm not sure it fits into inequality too, but Brexit has a similar mantra of "taking back the country" from a larger authority and had populist elements. In that sense, I do agree it is a reaction to the "elites" in some people's minds.