Answer Honestly" poster
The pattern
This still is filed under Us-versus-them positioning.
Define
The buyer is invited into a side. The product is what we use. The named other is what we refuse.
Mechanism
Identity contrast. Choosing the offer is choosing a group. The out-group does as much work as the claim.
Verdict
The category is crowded
Why it works
It directly asks the reader a confrontational question and sets up an explicit parallel between the 'sweat' of the factory and the 'blood' of the battlefield. The quote from the WPB chairman lends official weight.
Steal this when
You want to confront the reader directly about their commitment to a shared goal.