That may well be true but there is a difference between 'ignorance' and 'indifference'. The former is relatively easy to measure but the second is not. In fact

That may well be true but there is a difference between 'ignorance' and 'indifference'. The former is relatively easy to measure but the second is not. In fact the study on social mobility that supposedly demonstrates this indifference doesn't mention the word. It simply shows ignorance of American's understanding of social mobility but does not compare these findings with populations from other countries. Let's say that American's perception of social mobility was found to be significantly skewed relative to that of other populations'. Would that show more or less indifference? You could argue that the 'American Dream' cultural thinking leads more Americans to believe that the poor can become rich and at the same time more passionate about ensuring that that is indeed the case. The fact that it blinds them to the reality does not imply that they don't care.