In America, a dollar will buy you a candy bar and that's about it and not even the king sized one at that. In Russia a dollar, 27.8 rubles (two years ago it was 33 rubles) will still buy you a loaf of bread (and good bread at that not the wet chemical dow that we get) and 1.5 kg of potatoes. Thus the average family is earning 280 dollars per month and lives normally off of that.
Further, by CIA World Book calculations, Russia's PPP value stands at 1.28 trillion, making it the 6th largest economy and those are 2003 estimates. With a 6.9% growth rate this year, that sets it at: $1.368.
Economics is more then just looking at dollar value of someone, dollar is a relative issue, especially as a fiat and in effect unbacked piece of paper.