The scary Jack in the box character is Adolf Hitler. There are other allusions to WW2 in this short.
A spoof on newsreels, which played with a cartoon short, before a feature film at cinemas.
In the scene where a new store is being built and is immediately hit by a labor strike, the 'Owner' and the 'Contractor' are caricatures of Leon Schlesinger and Walt Disney. Both Disney and Warner studios were going through acrimonious labor disputes with animators around the time this short was made.
Vitaphone production reel #772A.
The father duck sounds like an early version of Daffy.