Saddam invaded Kuwait because he needed money to pay off his debt from the Iran war, according to the head of Iraqi military intelligence at the time. "When Saddam Hussein spoke he thought that Kuwait was the salvation from the poor economic state that resulted from the war with Iran ." (http://www.pbs.org/wgbh/pages/frontline ... rrai/1.htm) This also influenced him being in favor of higher oil prices, but the other arab countries didn't help him out.
Maybe the US government did have their eyes on Iraq's resources, certainly in the '03 war. But regardless, Saddam was at least as greedy, short sighted, and stupid as they were, lol.