Names of political figures that tie the war to oil

This is not a debate question, so no opinions please, just names of political figures.

Curious about this Yahoo news item"Greenspan, in his new book, “The Age of Turbulence: Adventures in a New World,” echoed long-held complaints of many critics that a key motivating force in the war is to maintain U.S. access to the rich oil supplies in Iraq."

I assume some of these critics are political figures. Who exactly?

The Australian Defence Minister recently stated that his nation’s presence in Iraq was primarily a matter of ensuring “resource security”.

The Aussie PM has downplayed the comments though.