These are always only pilot projects with limited funding. And who do you think is more likely to maintain this infrastructure and proudly tell their neighbours about them so that they can replicate it? Surely not the person that is annoyed that some rich guy from the capital with a digger came and did all the work and took all the money that they would have happily earned. These largely subsistence communities are cash starved and projects like that are a welcome opportunity to earn some money on the side.