What rubbish. It has nothing to do with wealth, what you are trying to say is 'the common people' - I see plenty of fat rich people and they have minging teeth - dental hygine is fairly basic & I dont think diet has much to do with how your teeth are, unless you are chomping sweets and guzzling fizzy pop. Income based bad teeth/diets...nah. Disagree strongly.
My 3 year old has the odd sweet as a treat - one of those Freddo bars of chocolate but he drinks gallons of milk & brushes his teeth, later I will post picture of his teeth, they are fantastic.
When I was a child, we all had milk at school. Perhaps they shouldnt have gotten rid of the school milk, a mid morning 'meal' and calci-yummy, its like everything else - replaced with chemicals and nonsense. Oh wasnt Margaret Thatcher just wonderful.