The Barnes family were working class. Digger would go from periods of drunken wandering to sober hardworking at oil installations, Maggie brought up Cliff and Pam, living in that small apartment, once Rebecca disappeared from the scene. Cliff worked hard as a young man to become a lawyer, determined to hold the likes of the Ewing family to account, while young Pam hated the Ewings and was a vandalizer of Ewing property, which she got away with. Pam had jobs like she did at The Store before she married Bobby.
The Cliff and Pam dynamic flipped at the time of the TV series, where Pam marries Bobby and starts to see the Barnes-Ewing feud as childish, while Cliff gets increasingly bitter at his setbacks and starts hating the Ewings to obsessive levels, which even Digger called Cliff out on during Series 3 DVD. Digger said something like "I don't HATE Jock Ewing. I just want what's mine."