The United States is an unequal society. According to the Congressional Budget Office, the top 20 percent get about half the nation’s income, compared to the 5 percent of all income shared among the bottom fifth of households. The top 10 percent of the population controls about 70 percent of the wealth. Among rich countries, America’s inequality is certainly extreme. But the world as a whole is an incredibly unequal place. Norway—held up as a model of equality—still sees the bottom fifth of households with incomes less than a third (PDF) those of the top fifth..
Why is there such inequality? The choices we make as individuals can put us considerably above or below our peer average in terms of income or happiness or status. But our peer average itself is set by forces beyond our control—factors such as to whom we were born. And our peer average explains our relative standing against national averages far more than our own choices.
Take the importance of family. In the U.S., about 50 percent of variation of wealth and about 35 percent to 43 percent of variation in income of children can be explained by the relative wealth and income of their parents, suggest economists Samuel Bowles and Herbert Gintis. One reason for this tight relationship is that parents who were educated are far more likely to educate their own kids. According to Michael Greenstone and Adam Looney of the Brookings Institution, the median wage of the average American male—employed or not—has declined by $13,000 since 1969. Most of that drop is because of plummeting earnings among those with a high school diploma or less, something that’s highly dependent on your parents. Evan Soltas examined the General Social Survey data and concluded that if your father didn’t graduate high school, you are eight times more likely not to graduate high school yourself—a 22.2 percent chance, as compared to a 2.9 percent chance among kids whose fathers did graduate.
The advantages of a privileged background don’t stop at graduation. Tufts economist Linda Loury suggests that half of all jobs in the U.S. are found through family, friends, or acquaintances. Canadian economists Miles Corak and Patrizio Piraino look at how often men end up working at the same company where their father worked, finding that as many as 40 percent have done that at some point. The proportion rises to 70 percent among the top 1 percent in income distribution. This helps to explain why the relationship between the earnings of parent and child is even higher at the top end than it is across the population at large, according to Corak. One-third of successions between chief executive officers in publicly listed companies in the U.S. involves an incoming CEO related by blood or marriage to the old CEO, the founder, or a large shareholder. That’s bad news for the share price, according to Francisco Perez-Gonzalez of the NBER, but clearly good news for the newly appointed relative.
How Did the World's Rich Get That Way? Luck (BloombergBusinessweek) I think that applies to Mr. Bloomberg, too.