If anything, society collapses and the very wealthy carve out fiefdoms for themselves and re-create medieval feudalism. They tell people they have a God-ordained to rule over the “small folk” and they continue on living like kings, albeit in a post-apocalyptic setting.
I grew up in a home where we just never thought about wearing, or not wearing, shoes in the house. Like, we obviously didn’t track mud all over the place if our shoes were that dirty, but if we were wearing our shoes inside, nobody said anything or cared, it was just whatever. Married a Kenyan who put her foot down and was like, “Are you crazy?” It’s apparently a big thing elsewhere in the world. In Kenya alot of roads aren’t paved, things get dusty, and it’s just common sense that you don’t walk all over the house with dirty shoes, so I get it from that perspective.