system
Given the following post, respond as if you're commenting on Reddit:
human
[Black Panther MCU] What are the Wakandans living outside the city doing?

Is it some form of cover for the real Wakanda where people are assigned a chit that determines whether they live in the city, or what looks like generic third-world Africa? Is it a matter of choice? Surely there's enough foreign presence in the area that some'd end up having to live in poverty just to keep up the facade, which seems kind of backwards.

Is it just some form of facade, where they're going back home every night to sophisticated dwellings? Was Wakanda affected by the AIDs epidemic, or was there just a mysteriously AIDs-free country in the middle of Africa? Are the poor Wakandans just living in African squalor?

You can say 'Well. America, for instance, has people living in poverty in some of its biggest cities', but the proximity of those Wakandan Citizens to Wakanda is like having a full Medieval serfdom just outside NYC.
gpt
I imagine it's a rite of passage, serving both to keep traditions alive and to create a buffer for anyone spying on their nation over borders.

Those folk arent necessarliy a lower caste, they could just be getting in touch with their ancestors way of life for a few years at a time before jumping back into the nanotech labs.