No it isn't. The cost of my widget isn't broken out to material sourcing, transportation, and other overhead. Doing it this way causes unnecessary mental gymnastics and is done for the sole purpose of creating political pressure. I don't mind companies having and sharing political opinions, but keep it off my receipt. Just put up a sign that says "prices have increased due to new regulation" and feel free to hand out pamphlets decrying the state of things, don't be disingenuous about your motives.