The BBC recently posted this snapshot of life in post-invasion Iraq. It would be sobering, if one did not already know how bad things were.
It's clear from this snapshot that infrastructure is simply not advancing in Iraq. The GAO has already reported that a lot of the money tasked to infrastructure simply isn't being spent. As a consequence, oil exports remain low, and electrical generation simply fluctuates around prewar levels -- well below contemporary requirements.
The BBC overview cites the official figures for Iraqi security forces, placing their numbers at about 320,000. Again, the GAO tells us that these numbers simply aren't accurate. Optimistically, it's maybe a third of that number. Maybe.
It's worth looking at the oil overview to see why alert sunnis in the middle of Iraq don't want the country split into three independent units.
Finally, make sure you check out the cost of living and wage comparison.