alt Hacker NewsIn my world, most multilingual speakers are children of immigrant families, and that transcends socio-economic boundaries. Plenty of immigrants were already wealthy before coming to the SF Bay Area, where we import highly educated, specialized workers. On the other hand, we also import physical laborers who are also generally multilingual but not in the same social class.
Some of these immigrants are very well supported with a strong social network, while others struggle with isolation.
On first reading I assumed you meant the physical laborers would have the stronger social network, and the wealthy would be more isolated (true in my experience). But you may have meant just the opposite!
In fact it's two separate questions because it can go both ways, heavily.
Interesting food for thought, thanks for posting.