Well, when I first started watching, back in 2012, I didn't really care about that. So when I saw an upper class existing in pony society, it went right over my head. Now, tho....
It bothers me, I don't have a problem with things I find bad existing in fiction, I welcome it, it makes good conflict, a story would be boring without it, however....
The moral dissonance part kicks in when I feel like the author is trying to tell me that these things I find immoral are okay. It makes me uncomfortable.