"you don't seem to have noticed..NASA has programs going on all over the solar system"
Let me amend my comment.
Where human spaceflight is concerned Marshall (the bit that designs launch vehicles) is a one-programme-at-a-time center. JPL and Goddard (who do probes and remote systems) do rather more with rather less.
In fact in Marshalls case it's about 1 new system every couple of decades. (Shuttle in the 70's and 80's was the last new system they worked on.
Personally I think they should be shut down, but NASA is not allowed to to make that decision (about it's own centers). I'm not sure if any of the other 22 Federal agencies have that right. I think they do.