Of course, many middle classes now suppose it's not God that's responsible for the entrenched social hierarchy but Darwinian social selection selecting for intelligence: 'Middle class children have better genes' says former OFSTED head Chris Woodhead.
What's the biggest obstacle to entering the prestigious middle class professions: sex, race, or class? Who would find it hardest to climb that greasy pole, a black middle class male, a white middle class female, a white working class male? I would guess class is the biggest obstacle. And unjustly so. Class-ism: the bigotry that's still largely unrecognised.
If the The Archers were to pander to and entrench racial stereotypes the way it does class stereotypes, it would be off the air in a week.