The pragmatic choice for a government is to pay someone to map the roads, and require the output to be open data. That open data benefits citizens is pretty muc

The pragmatic choice for a government is to pay someone to map the roads, and require the output to be open data. That open data benefits citizens is pretty much a given at this point. If the government then wants to work with commercial vendors of maps to integrate that data, then that is fine too. They can use the open data set just like anyone else, or the government could pay them to integrate that data if there is no intrinsic commercial interest in doing so.