Paul Krugman has the cover article in this week's NY Times Magazine, on how America is becoming a plutocracy, and that the days of America as a middle-class society are ending. He also points out that all of our arguments about America being the richest country, and benefitting from it, don't really hold once you realize that we're now at that point because the rich have so much, not because the average American does.

One criticism: He barely mentions the role of organized labor in the creation of a middle-class America in the 1950s and 1960s.

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One ploy often used to play down growing inequality is to rely on rather coarse statistical breakdowns -- dividing the population into five ''quintiles,'' each containing 20 percent of families, or at most 10 ''deciles.'' Indeed, Greenspan's speech at Jackson Hole relied mainly on decile data. From there it's a short step to denying that we're really talking about the rich at all. For example, a conservative commentator might concede, grudgingly, that there has been some increase in the share of national income going to the top 10 percent of taxpayers, but then point out that anyone with an income over $81,000 is in that top 10 percent. So we're just talking about shifts within the middle class, right?

Wrong: the top 10 percent contains a lot of people whom we would still consider middle class, but they weren't the big winners. Most of the gains in the share of the top 10 percent of taxpayers over the past 30 years were actually gains to the top 1 percent, rather than the next 9 percent. In 1998 the top 1 percent started at $230,000. In turn, 60 percent of the gains of that top 1 percent went to the top 0.1 percent, those with incomes of more than $790,000. And almost half of those gains went to a mere 13,000 taxpayers, the top 0.01 percent, who had an income of at least $3.6 million and an average income of $17 million.

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You might think that 1987, the year Tom Wolfe published his novel ''The Bonfire of the Vanities'' and Oliver Stone released his movie ''Wall Street,'' marked the high tide of America's new money culture. But in 1987 the top 0.01 percent earned only about 40 percent of what they do today, and top executives less than a fifth as much. The America of ''Wall Street'' and ''The Bonfire of the Vanities'' was positively egalitarian compared with the country we live in today.

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Canadians can expect to live about two years longer than Americans. In fact, life expectancy in the U.S. is well below that in Canada, Japan and every major nation in Western Europe. On average, we can expect lives a bit shorter than those of Greeks, a bit longer than those of Portuguese. Male life expectancy is lower in the U.S. than it is in Costa Rica.

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Although America has higher per capita income than other advanced countries, it turns out that that's mainly because our rich are much richer. And here's a radical thought: if the rich get more, that leaves less for everyone else.

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Many Americans assume that because we are the richest country in the world, with real G.D.P. per capita higher than that of other major advanced countries, Americans must be better off across the board -- that it's not just our rich who are richer than their counterparts abroad, but that the typical American family is much better off than the typical family elsewhere, and that even our poor are well off by foreign standards.

But it's not true. Let me use the example of Sweden, that great conservative bete noire.

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But life expectancy in Sweden is about three years higher than that of the U.S. Infant mortality is half the U.S. level, and less than a third the rate in Mississippi. Functional illiteracy is much less common than in the U.S.

How is this possible? One answer is that G.D.P. per capita is in some ways a misleading measure. Swedes take longer vacations than Americans, so they work fewer hours per year. That's a choice, not a failure of economic performance. Real G.D.P. per hour worked is 16 percent lower than in the United States, which makes Swedish productivity about the same as Canada's.

But the main point is that though Sweden may have lower average income than the United States, that's mainly because our rich are so much richer. The median Swedish family has a standard of living roughly comparable with that of the median U.S. family: wages are if anything higher in Sweden, and a higher tax burden is offset by public provision of health care and generally better public services. And as you move further down the income distribution, Swedish living standards are way ahead of those in the U.S. Swedish families with children that are at the 10th percentile -- poorer than 90 percent of the population -- have incomes 60 percent higher than their U.S. counterparts. And very few people in Sweden experience the deep poverty that is all too common in the United States. One measure: in 1994 only 6 percent of Swedes lived on less than $11 per day, compared with 14 percent in the U.S.