I found this on the National Gallery of Australia's website.
It's from an exhibition called Space Invaders which is currently touring around Australia.
The exhibition recently finished up at the University of Queensland and is now bound for the RMIT Gallery in Melbourne from 1st September to 5 November 2011 - Good news for me, as I will be in town in October.
I love the simplicity of this particular design, coupled with the powerful message.
Begging for Change 2004