Ya'll gotta do what he says.
Furthermore, we declare, we proclaim, we define that it is absolutely necessary for salvation that every human creature be subject to the Roman Pontiff. UNAM SANCTAM (Promulgated November 18, 1302)
http://sourcebooks.fordham.edu/halsall/source/B8-unam.asp
When will you cease your bearing of false witness?
PHOOEY! That’s Latin for bullshit.
Not sure where you get THAT notion, but it's completely wrong. Folks think when we say infallible, it means every utterance of the Pope. Not at all. The only 'infallible' statements are those that are agreed upon by Bishops representing Catholics all over the world, and those are on doctrine, not political or social justice matters.
For example, the Pope considers Global Warming a problem because of what he has heard from scientists. He's coming from a place of promoting stewardship for God's creation. I can agree with that, but disagree with him about any human involvement in a possible warming of the earth, and there's not a problem with that, because it has nothing to do with doctrine, or dogma.