[rmnunez]

I think the answer depends on how much of a lefty one is. Those who normally oppose US foreign policy regardless of shape or form will see the US is clearly obligated to compensate Iraq for the harm and damage they've rendered and likely they'd expect valuation by western standards so whatever a wrongful death claim averages in US court would seem appropriate to multiply by whatever the critic believes is a 'reasonable' estimate of the casualties in Iraq. Probably they'd also expect the infrastructure to be better than merely restored, it would have to be upgraded to be fully functional despite any deficiencies it previously had. Given that many who were quite critical early-on so strongly endorsed this "nationbuilding" concept, likely something on the scale of the Marshall Plan (but without any strings attached) would be the ticket.