From the Politico story about Scott McClellan's new book:
Bush was "clearly irritated,
steamed," when McClellan informed him that chief economic adviser Larry Lindsey had told The Wall Street Journal that a possible war in Iraq could cost from $100 billion to $200 billion: "'It's unacceptable,' Bush continued, his voice rising. 'He shouldn't be talking about that.'"
From the CIA's 2004 report on Iraq's WMD:
Advisory groups [Saddam] established generally assumed Saddam already had a preferred position [on issues] and commonly spent time trying to guess what it was and tailor their advice to it. More conscientious members of the Regime sought to work around sycophantic or timid superiors...Saddam ignored his economic advisors in the Ministries of Finance and Planning with respect to strategic planning. For example, Saddam entered the Iran-Iraq war heedless of Ministry warnings about the economic consequences. He had no plan or strategy for how the war was to be financed.