If you actually care to get the facts there is a good Frontline called "Losing Iraq" that goes into detail of exactly how we fucked up (spoiler: Partisan hacks won't be pleased as blame is cast on both Bush and Obama).
http://www.pbs.org/wgbh/pages/frontline/losing-iraq/
If you don't care to watch that here is the synopsis: we vastly underestimated the amount of time, money & resources needed to rebuild Iraq after we bombed it to shit. After about a decade of failed attempts we actually started to get things headed in the right direction towards the end of the Bush presidency. We stopped the sectarian fighting by paying and training the minority tribes to become mercenaries for the central government(that group was called "The Sons of Iraq"). After a decade of trying to fight an underfunded and undermanned war we had found a solution that minimized US involvement but armed a bunch of fucking crazy ass tribesman which, if you remember the outcome of the Soviet War in Afghanistan, didn't end well for the US(Taliban, Osama Bin Laden, 9-11... you get it).
Then Obama came into office and was hell bent on getting out of Iraq despite what generals were telling him. We started pulling troops out and the majority Islamic faction, on queue, started committing religious genocide against the minority tribes. But this time they were armed with weapons that the US gave them as mercenaries for the central government. Same as the fucking Taliban in the 80s. So now you have ISIS which was the Sons of Iraq who were trained and armed by the US.
The notion of jobs being a solution is really saying "we actually need to build a nation state that is sustainable and inclusive to every faction inside Iraq." Jobs is a part of it. A seat at the politcal table for all religious factions is a part of it. The reality is that Iraq is a religious battleground and the prospects of all that happening is pretty fucking small. Which begs the question why were in there in the first place? Once boots were on the ground, why pussy-foot around and try to minimize our activity in the country? And once we have some shit working why pull out when we can pretty much guarantee the outcome is going to be shitty for both Iraq and the US?