"Iraq pays for UNMOVIC through oil sales via an escrow account (0.8% of oil revenues).
This allows financial control over Iraqi assets for UNMOVIC, and thus gives the United Nations another set of dentures in its dealings with Iraq.
The money from Iraqís oil sales also enables UNMOVIC to employ all of its staff, inspectors and technical experts on United Nations contracts (one-year or sixmonth duration). In so doing, 1284 deals with one of the main criticisms of UNSCOM, that staff were paid for by their governments and thus may have felt beholden to their individual governments rather than to the United Nations. This criticism was refuted by many involved in UNSCOM but the worry still persisted.
Directly employing UNSCOM staff allows the United Nations to impose its rules on employee loyalty and significantly Article 100 of the United Nations Charter, which instructs staff not to seek or receive instructions from any government or from any other authority and charges Member States not to seek to influence staff in the discharge of their responsibilities."
If the US liberates Iraq, the funding for UNMOVIC goes away, and so does the lifestyles of all involved. They have to go back to begging for money. That is why they do not want the situation changed. They will do everything in their power to maintain the status quo. If the sanctions are lifted as Iraq is now asking for, the same thing occurs. So they will fight for that not to happen too.
Follow the money!!