Absent copyright, developing things that are non-excludable is a collective action problem. Just about everyone agrees that government is an appropriate venue for some of these (frequently defense, policing, roads, schools). You can draw your particular line where you want, of course, but I reject the notion that there is a clear, morally motivated hard line that everyone should obviously subscribe to between any of these things and other projects. Government is how we coordinate certain kinds of efforts that won't permit individual opting out but which (hopefully) benefit us on the whole.