I agree. Government funding of R&D pays big benefits. That is ture but has no neceassry connection to manned space exploration. It is NOT a direct benfit of knowledge gained about space. It is technology development done right here on Earth! We could get more of the same by, for example, more government spending on how to store solar energy, either in its electric or thermal captured form. That would give huge benefits, as storage is currently the limitation on replacing coal with solar energy. We need a crash program to keep Earth habital for our grandchildren.