"Wealthy" is extremely relative, which is why people here think of SV oligarchs, but people in a very poor part of the world might see the standard of living of the average middle class person in another country as wealthy.

For example the people in Fnideq, Morocco can see how people in Ceuta are living directly, and media deptiction (including quite accurate ones) of how people live in Spain. Now while you or I would find both to probably be a significant lifestyle downgrade, to a destitute young man in Fnideq it's literally tempting enough to risk their lives to bridge that gap.

Wherever you are in the world you now have a window into the possibilities, the lifestyles, the leisure, the lack of humiliating poverty that others experience. It's not just human nature to see that and want it, it's primate nature.

https://pmc.ncbi.nlm.nih.gov/articles/PMC2141866/