it's the oil:
Iraq has 115 billion barrels of known oil reserves. That is more than five times the total in the United States. And, because of its long isolation, it is the least explored of the world’s oil-rich nations. A mere two thousand wells have been drilled across the entire country; in Texas alone there are a million. It has been estimated, by the Council on Foreign Relations, that Iraq may have a further 220 billion barrels of undiscovered oil; another study puts the figure at 300 billion. If these estimates are anywhere close to the mark, US forces are now sitting on one quarter of the world’s oil resources. The value of Iraqi oil, largely light crude with low production costs, would be of the order of $30 trillion at today’s prices. For purposes of comparison, the projected total cost of the US invasion/occupation is around $1 trillion.
(...) The draft law that the US has written for the Iraqi congress would cede nearly all the oil to Western companies. The Iraq National Oil Company would retain control of 17 of Iraq’s 80 existing oilfields, leaving the rest – including all yet to be discovered oil – under foreign corporate control for 30 years.
(...) By establishing permanent military bases in Iraq. Five self-sufficient ‘super-bases’ are in various stages of completion. All are well away from the urban areas where most casualties have occurred. There has been precious little reporting on these bases in the American press, whose dwindling corps of correspondents in Iraq cannot move around freely because of the dangerous conditions.
(...) In February last year, the Washington Post reporter Thomas Ricks described one such facility, the Balad Air Base, forty miles north of Baghdad. A piece of (well-fortified) American suburbia in the middle of the Iraqi desert, Balad has fast-food joints, a miniature golf course, a football field, a cinema and distinct neighbourhoods – among them, ‘KBR-land’, named after the Halliburton subsidiary that has done most of the construction work at the base. Although few of the 20,000 American troops stationed there have ever had any contact with an Iraqi, the runway at the base is one of the world’s busiest. ‘We are behind only Heathrow right now,’ an air force commander told Ricks.
(...) As for the number of US troops permanently stationed in Iraq, the defence secretary, Robert Gates, told Congress at the end of September that ‘in his head’ he saw the long-term force as consisting of five combat brigades, a quarter of the current number, which, with support personnel, would mean 35,000 troops at the very minimum, probably accompanied by an equal number of mercenary contractors. (He may have been erring on the side of modesty, since the five super-bases can accommodate between ten and twenty thousand troops each.) These forces will occasionally leave their bases to tamp down civil skirmishes, at a declining cost in casualties. As a senior Bush administration official told the New York Times in June, the long-term bases ‘are all places we could fly in and out of without putting Americans on every street corner’. But their main day-to-day function will be to protect the oil infrastructure.'
(...) Among the winners: oil-services companies like Halliburton; the oil companies themselves (the profits will be unimaginable, and even Democrats can be bought); US voters, who will be guaranteed price stability at the gas pump (which sometimes seems to be all they care about); Europe and Japan, which will both benefit from Western control of such a large part of the world’s oil reserves, and whose leaders will therefore wink at the permanent occupation; and, oddly enough, Osama bin Laden, who will never again have to worry about US troops profaning the holy places of Mecca and Medina, since the stability of the House of Saud will no longer be paramount among American concerns. Among the losers is Russia, which will no longer be able to lord its own energy resources over Europe. Another big loser is Opec, and especially Saudi Arabia, whose power to keep oil prices high by enforcing production quotas will be seriously compromised.
(...) In the short term, Iran has done quite well out of the Iraq war. Iraq’s ruling Shia coalition is now dominated by a faction friendly to Tehran, and the US has willy-nilly armed and trained the most pro-Iranian elements in the Iraqi military. As for Iran’s nuclear programme, neither air strikes nor negotiations seem likely to derail it at the moment. But the Iranian regime is precarious. Unpopular mullahs hold onto power by financing internal security services and buying off elites with oil money, which accounts for 70 per cent of government revenues. If the price of oil were suddenly to drop to, say, $40 a barrel (from a current price just north of $80), the repressive regime in Tehran would lose its steady income. And that is an outcome the US could easily achieve by opening the Iraqi oil spigot for as long as necessary (perhaps taking down Venezuela’s oil-cocky Hugo Chávez into the bargain).
(...) And think of the United States vis-à-vis China. As a consequence of our trade deficit, around a trillion dollars’ worth of US denominated debt (including $400 billion in US Treasury bonds) is held by China. This gives Beijing enormous leverage over Washington: by offloading big chunks of US debt, China could bring the American economy to its knees. China’s own economy is, according to official figures, expanding at something like 10 per cent a year. Even if the actual figure is closer to 4 or 5 per cent, as some believe, China’s increasing heft poses a threat to US interests. (One fact: China is acquiring new submarines five times faster than the US.) And the main constraint on China’s growth is its access to energy – which, with the US in control of the biggest share of world oil, would largely be at Washington’s sufferance. Thus is the Chinese threat neutralised.