I think this kind of report is somewhat worthless, because there are so many different "standards of living" that making a cost analysis of a national standard of living is abstracted to the point of being meaningless.
I'll give you an example. I spent part of my childhood in India, which (as everyone knows) is a developing nation, i.e. it's poor. People living in filth, villagers with no technology, power outtages, disease, etc.
What most people don't know is that this is all true...but true for the lower class. This economic class is incredibly large, of course, but in a nation as large as India, even a small percentage of middle and upper-middle class amounts to a massive number of people as well.
I have friends and relatives who are middle class in various parts of India. I can say without a doubt that their standard of living is much, much higher than mine here in the United States.
Their neighborhoods are clean. Because they are middle class, police patrol frequently and take care of things promptly. Many of them live in new housing developments, meaning that they own houses that are less than a couple of years old. They own more than one car, and have a driver to drive it for them. They have servants to clean the house. They have better healthcare than the United States, cheap enough that very few of them bother with health insurance (yes, there are "expensive" hospitals in India that offer world-class healthcare facilities, but you have to be middle class to afford them...and "expensive" is so much cheaper than the US that there's no comparison). They have high speed internet connections, backup power generators running on diesel fuel in the event of a power outtage, and live a life of absolute luxury. Their children eat at McDonalds, and shop in gigantic luxury shopping malls modeled on the best of Singapore...somewhat more luxurious than the US. They are members of elitist clubs where their children learn to ride horses or swim or play golf.
Now, think of the mental image you have in your mind of poor India, and then juxtapose this image. We're talking a standard of living that the upper-most classes in the US just about reach, which most of the Indian middle-class takes for granted. And this is why India is a bigger market for cell phone technology (for example) than the US...India has a fairly large middle class population (though not as a percentage, since there are so many more "poor" people in India) which makes for a gigantic market. Cars, computers...this stuff is selling, and selling fast. I know people giving up *very* comfortable jobs ($150k combined income from two earners) and lives in the US who are going back to India...to live at a much higher standard at a fraction of the cost. Their incomes are lower (in some cases, only a little lower) but their standard of living is so much higher, they're actually making more "real" income.
When both of these worlds can co-exist, what meaningful "standard of living" indicators could you use for India as a whole? General indicators say we're still a really poor country. An in-depth look says that we're an incredibly poor country with some incredibly well-off population groups. In neighboring Bangladesh, the gap is even wider, with the rich being much "richer" and the poor being much "poorer".
The US is the same. There are pockets in this country that live so richly, and others living so poorly, that I can't see a "national" averaging of the standard of living being meaningful. For example, I make almost *no* money...to the point where it's difficult for me to get a college education, because I can't afford it. Not being able to afford it earlier meant that I was working 40-60 hours a week while trying to maintain full time status at the nation's fifth ranked liberal arts college. The result? My grades sucked. This makes it almost impossible for me to transfer to a decent institution now. I can't afford healthcare in the US...if something bad happens, I have to hope it's not an emergency, or fly back to India to have it looked at (the plane ticket would be cheaper than my bills for even something minor here). I can't afford a car. If I was like most Americans I meet who are in my economic / social class, I would go further into debt to buy a car anyway. Buying a house is out of the question.
Will this change? Yes, because I have several years of website development experience. I am fairly certain my economic situation will change. But for many others I meet every day, I am as certain that change in their lives will be much more difficult. I work with community centers that teach technology classes to lower-income communities. You guys should try it sometime...or just try hanging out at the food stamps office someday. The "average" standards of living this article is talking about simply do not apply to specific populations...I think the range is too wide, statistically, for an averaging to be meaningful.
Dave.