They don't know the definition of sensibility. It's about sticking to principles even in the face of evidence that those principles are flat-out wrong, stupid, or pointless. It's about being principled for the sake of being principled.
They don't care if a policy sends every man, woman, and child to a life of destitution as long as not even one person gets a hand-out. The mentality is just so childish, and I don't even know how they function.