But the chances of a person born poor climbing all five classes into the top (“making it”)[…]are too small to constitute a real freedom.[…], one sociologist puts the upper class at roughly 3 percent of the population. About 7.7% of that has moved in from below – a minute, and historically persistent, figure.[…]But the trick of flaunting possibility to mask actual probability is not a casual device.
(h/t to the Barefoot Bum)