Canadians spend less on campaigns than the "biggest spenders" on that chart combined, with 37 million citizens.
http://en.wikipedia.org/wiki/Federal_political_financing_in_...
During the 2010 presidential election Brazilians spent $2 billion on campaigns and have ~200 million citizens.
http://articles.cnn.com/2012-01-24/world/world_global-campai...