“Basically, Iraq is trying to build a consumer society, not on state capitalism like in China, but on socialism,” said Marie-Hélène Bricknell, the World Bank’s representative in Iraq.

One of Washington’s principal aims was to develop a free-market economy here. Yet with so much oil wealth at hand, Iraq’s leaders have taken few steps to develop a private sector. More than 90 percent of Iraq’s government revenues derive from oil, and with oil production rapidly expanding, the country’s annual revenues could triple over the next five years, to more than $300 billion. With that kind of wealth rolling in, one of the greatest questions the country faces is what it will do with all that cash.

Given the statist mentality of most top Iraqi officials and widespread corruption, diplomats are generally pessimistic that the expected boom in government revenues will be used either to help develop a private sector or to pay for an ambitious public works program — something the country, where 40 percent of the population still lacks access to safe drinking water, desperately needs. Instead, experts worry it will finance more of what Iraq already has: corruption and a huge government work force.

Most of the major industries remain in the hands of the state, and the greatest ambition of many Iraqis is to secure a government job. According to statistics from the Iraqi Ministry of Planning, almost a third of the labor force works for the government. That is more than five million people, and the number is rising, as political parties that run government ministries use paychecks to expand their constituencies.

“The state’s payrolls have massively expanded, not with technocrats but with party functionaries, because the state has become a way of funding party loyalty,” said Toby Dodge, a professor at the London School of Economics, at a recent panel discussion in London about Iraq. “That’s directly undermined and hindered the state’s ability. So we have a huge state.”