Here's what the Google Images algorithm considers to be the most SEO-friendly representations of poverty and wealth. Added to the search was the "grey" preference filter for the images. I thought about prefering "green" for wealth, but the repetition of the book cover for Green Wealth
was too annoying. Click on the each of the two pics to zoom up a bit, though you should probably download them to see them full scale.
I also dug the image of the pin saying "Poverty is a Weapon of Mass Destruction". It reminded me of my favourite song by Faithless.