The ability to provide services is often reliant on funding from outside sources and its continuation is based not on the needs of those being served, but on what they can find funding to provide.  Often an organization's decision to cease operations in a country has more to do with a lack of financial support than the successful completion of their programming. There are certainly other issues with over reliance on NGO services, such as the fact that their services often don't solve the underlying infrastructure issues that will reemerge once the NGO presence is reduced.  Many NGOs do not remain in-country for the post-conflict period.  In effect, services are provided and once the initial emergency is over, the NGOs are gone and those still displaced must find a health provider somewhere else. 