I saw this video clip a couple of days ago, and it is pretty shocking. I know it is 6 minutes long, so to cut to the chase...
1% of the population of the USA own 40% of the wealth (54 trillion dollars in 2009 being the total wealth). On the chart shown in the video, the middle class are barely distinguishable from the poor.
Many of the 1% wealthiest in the USA pay as little as 15% tax, while the lowest income workers pay one third of what they earn in taxes.
For those who don't have the time to watch this video, there is a screen-shot I have taken from the clip below the youtube video, which shows how badly skewed the distribution of wealth is in the US.