Don’t you slander the ferengi like that! Their economic system is mega fucked, but it is at least honest about that and consistent.
They have a specific code of (business) conduct they for the most part always adhere to, and no ferengi will cry foul when someone else fucks them over as long as it’s done according to the rules.
And as Quark points out in that one episode, we did and do a bunch of barbaric things the ferengi never did because they wouldn’t go that far, like slavery and genocide.
The Ferengi totally do slavery, they just lie to themselves about indentured servitude and jobs that pay less than a living wage being not-slavery.
They say they don’t do slavery but hen you hear how they regard feeeeemales
that’s not really slavery, since the feeeemales aren’t/weren’t allowed to work outside of the household