Earlier quoted context omitted.
> The average income for the USA in 2008 was $28K! > That's the average - meaning that for every person earning $75K (not that much) there are a dozen people earning $20K. For all your emphasis, this is a pretty dramatic misunderstanding of how averages work. You'd need a histogram to make the claim you're making. The population earning $75K can equal the population earning $20K, or have basically any other relation…
That's why they use Median Income When talking about average income in the US https://en.wikipedia.org/wiki/Personal_income_in_the_United_...
And yes, as dragonwriter points out, your own link clearly shows that the mean US income for 2008 was just over $28K. (It also shows that the mean US income for 2008 was just under $27K; within-article consistency is not a big priority on Wikipedia...)