"The average earnings of the richest 10 percent of Americans are 16 times those for the 10 percent at the bottom of the pile. That compares with a multiple of 8 in Britain and 5 in Sweden. Not coincidentally, Americans are less economically mobile than people in other developed countries. There is a 42 percent chance that the son of an American man in the bottom fifth of the income distribution will be stuck in the same economic slot. The equivalent odds for a British man are 30 percent, and 25 percent for a Swede."
Organization for Economic Cooperation and Development