In today's issue of the
Joong Ang Daily, writer Kim Hee-jin describes the "increasingly polarized" nature of Korean society, wracked by rising income inequality and riven with political strife as a result. Quoting the OECD's Social Policy Brochure for Korea, Kim ascribes these ills to "unfair job opportunities and working conditions between regular and nonregular workers as well as gender discrimination."
Drawing on figures from Statistics Korea, Kim writes:
According to Statistics Korea, the nation’s middle class is shrinking each year. The middle class made up 75.4 percent of the entire population in 1990, but the figure dropped to 67.5 percent in 2010.
Instead, low- and high-income classes have expanded. Households in the bottom 20 percent of the income bracket made up 7.1 percent in 1990 but 12.5 percent in 2010. The top 20 percent, meanwhile, grew from 17.5 percent to 20.0 percent in the same period.
The gap in average monthly income has also grown. In June 2011, the top 20 percent of households earned about 7.1 million won ($5,991) per month — 1.8 million won more than in 2003. In the same period, the bottom 20 percent’s monthly income increased by only 290,000 won, from 868,000 won to 1.15 million won.
Readers who have spent any time whatsoever pondering economics statistics will have likely perked up when the word "household" made its appearance, as this is a notoriously fluid term which tends to muddy comparisons of different time periods. Consider divorce, for instance, which has grown more prevalent in the world over the past twenty years. A spike in divorce rates means a corresponding increase in the total number of households, but a decline in the number of persons per household. Or take immigration, which tends to expand the number of households in the lower income brackets. Thus, if Korea has experienced an increase in immigration over the past twenty years, we should not be surprised to find that the bottom income quintile has also expanded. This is not to say that the above statistics are wrong, but rather to suggest that, at a minimum, they beg a whole host of questions which we ought to explore before jumping to any misguided conclusions about public policy.
As it happens, Jacob Goldstein of NPR's
Planet Money did
a piece on the apparent increase in global inequality (within countries, not between countries) earlier this year and suggested the following explanations:
1. Robots, etc.
Trade barriers have come down. Technology has advanced. The combination of these two factors has disproportionately benefited highly-skilled workers. You want to be the guy building the robot, not the guy whose job got replaced by a robot.
2. Rich people marry rich people
Inequality is calculated by household, not by individual. And a few changes at the household level have driven some of the increase in inequality.
For one thing, it's become more common for people to choose spouses in their own income bracket. In other words, rich people are now more likely to marry other rich people, and poor people are more likely to marry other poor people. (There's a creepy term for this: "assortative mating.")
Single-parent households and single-person households without children have also become more common. Both groups are disproportionately likely to be at the bottom of the income ladder.
3. Free-wheeling job markets
State ownership of corporations has declined. Price controls have become less common. Minimum wages have fallen relative to average wages. Legal changes have made it easier to fire temporary wokers.
Taken together, these changes have actually improved overall employment levels. (Businesses are more likely to higher hire workers when they can pay lower wages and when it's easier to fire people.)
But despite the gain in employment, the same shifts may also have driven up inequality. In the words of the report, "the high-skilled reaped more benefits from a more dynamic economy."
That final line of #3 reminds of George Will's quip that if we want to reduce inequality, we just need to convince everyone to drop out of school at an earlier age.
Finally, it's important to note that inequality is not, by itself, a bad thing. Soccer star Park Ji-Sung makes millions of dollars/euros each year roaming the midfield for Manchester United, but I doubt many people would begrudge him his fortune, even if it does skew the inequality figures. Similarly, a friend of mine in Seoul makes a healthy living operating his own restaurant, which almost certainly puts him in a higher income quintile than me. Yet, I am certainly not made poorer by the success of either Park or of my friend - indeed, my life is enriched by what they contribute to the world, and their earnings suggest that other people think likewise.
Income inequality becomes a problem when the fortunes of the well-off are the ill-gotten fruits of political connections and rent-seeking. Thus, when conglomerate heads receive special treatment in the judicial system for their crimes, or when industry heads prosper behind artificial trade barriers, ordinary, middle-class citizens are rightly indignant. This, however, is a problem not so much of inequality, per se, but of crony capitalism.
For more on the tricky nature of measuring inequality, see
here and
here.