How do people (members of trading societies) get money? Do they do so socially–or individually?

I am at the university, here in the library, looking over the shoulder of a young gal shoppin’, apparently. Lookin’ over a list of hotel rooms an’ this gal’s prices are like 6 or seven hundred of the dollar and I be just wonderin’ how persons in capitalism get their money.

Just individualistically or by their social interactions with others? Do you get money by being a socially disconnected person? Is that how capitalism grew?