And I would like to add this paper, which I found instructive, to say the least:
http://homepages.wmi...johnson/Payne.pdf
[...]
"Hidden rules are the unspoken clues that individuals use to indicate membership in a group. The
chart on hidden rules (see p. 5) provides details, but generally, in middle class, work and
achievement tend to be the driving forces in decision-making. In wealth, the driving forces are the
political, social, and financial connections. In generational poverty, the driving forces are survival,
entertainment, and relationships.
[...]