Do NGOs have an obligation to work with local governments in the provision of education? In cases where the government is unable or unwilling to provide education to a particular group, should NGOs aid the government in doing so or provide it on their own without the government?

What would result if a marginalized population began to rely on or respect education-providing NGOs more than their national government? Will the government lose its legitimacy? Are there some NGOs that might do this on purpose, with the goal of making the government lose its legitimacy?