How we cite our quotes: (Chapter.Paragraph)
Quote #7
"Class?" said Scarlett, startled at the idea. "Class? What does class matter now, so long as a girl gets a husband who can take care of her?"
"That's a debatable question," said Old Miss. "Some folks would say you were talking common sense. Others would say you were letting down bars that ought never be lowered one inch. Will's certainly not quality folks and some of your people were." (40.77-78)
Part of the reason Scarlett is able to do so well after the war is that she doesn't really care about class; she's willing to work, and pursue money, and forget about what's supposed to be right for a person of her standing. The suggestion in the novel is that this is in part because she's the daughter of Gerald, who was a self-made man himself. Which in turn, suggests that even her lack of care about class is a function of class; she's the daughter of a hustler, and she's a hustler, too.
Quote #8
He felt that it was a traffic in human bodies on a par with prostitution, a sin that would be on his soul if he permitted her to do it. (41.185)
Frank is very upset at the idea of using convict labor; he sees it as "traffic in human bodies"—it's not classy. But owning slaves was fine. The problem here isn't the traffic, but the fact that you're treating white convicts the way black people were treated. The lack of class is precisely the messing with class distinctions based on race.
Quote #9
"I did so want to see you! You must come in the house."
"I can't do that, Miz Wilkes." Belle Watling's voice sounded scandalized. (46.47-48)
Belle, like Mammy, is shown to be a good person because she supports the class system that treats her like dirt. And, by the same token, her support for the class system shows that the class system is a good thing. It's a fantasy of a world where the people you step on are just begging for you to step on them. Which is appealing if you're someone who identifies only with those doing the stepping, but for everyone else it's more than a little nauseating.