Schubert Jokes

An efficiency consultant gave his critique of Schubert's Unfinished Symphony:

All 12 violins played the same notes. This is unnecessary duplication. Their number should be cut.
For a considerable period oboe players had nothing to do. Their number should be reduced and their work spread evenly among other staff.
No useful purpose is served by repeating with horns the passage that was already handled by the strings. If such redundancies were eliminated, the concert could be cut 20 minutes.
The symphony has two movements. Mr. Schubert should have been able to achieve his musical goals in one.
Conclusion: If Mr. Schubert had paid attention to these matters, he would have had time to finish the symphony.

Knock Knock
Who's there!
Schubert!
Schubert who?
Schubert I can!