While the recession put a bit of a damper on the gains of the 1 percent, previous OECD research shows that they've already gained back their losses, and then some.
In the U.S., over 80 percent of income gains have gone to the top 10 percent of earners
Since 1975, the top 1 percent have captured nearly half of all income gains in the U.S., and the next 9 percent have captured nearly a third. That leaves 20 percent of income gains for the remaining 90 percent of wage earners. This disproportionate income surge "helps explain why so many people have not felt their incomes rising in line with national GDP growth," the OECD writes.
By contrast, in Denmark about 90 percent of the income gains have gone to the bottom 90 percent of earners. The bottom 90 percent received large shares of income growth in other European countries as well.
Long story short: the past 40 years have been much kinder to the top earners in the U.S. than to top earners anywhere else.
Tax policy has been a major driver of the rise of top incomes
In 1981, the average top income tax rate among OECD countries was 66 percent. Today, it's only 43 percent - effectively, top wage earners have seen their income taxes cut by one-third. "The decline in top rates of income tax leads to a reduction in the tax burden carried by high earners and thus increases their post-tax income," the OECD writes. "Higher disposable income makes it easier for individuals to save and accumulate capital which eventually increases incomes further." Paging Dr. Piketty?
Other taxes primarily affecting top earners - like inheritance and capital gains taxes - have seen substantial cuts as well.