It seems crazy to disagree on economic principles anyway. The ways about which one should try to answer a question like "The GDP will go down under policy X, as compared to policy Y" are fairly uncontroversial, and yet people disagree passionately about which answer is right when it's clear that their convictions are under-determined. How can they become so moralistic about what to me seem like dry amoral facts? And yet, I have the same impression - that peoples' moral intuitions correlate strongly with the type of economics they believe in.