My problem with this strip is not so much that interns have to do menial work (they do) or that Dilbert doesn't bother to communicate it nicely.
The thing is that Dilbert wouldnâ€™t bother with the latter because using additional words to mask a situation that is obvious to everybody anyway is inefficient and thus goes against a founding principle of engineering.
When I was an Intern during college this happened to me all the time. Interns get all the tedious grunt work that nobody ever wants to do. As an example, I spent a whole summer fixing compiler warnings so that when all the developers compiled their code, they didn't have to see all of the "annoying" messages telling them that they're doing it wrong.