Oh, I know (and have read a good bit of your writing), which is why getting a BA in econ was so painful for me. I'm sitting here trying to explain the basics of logic to my f'ing professors (except for my thesis advisor, thank gawd, who was a Marxian).
Me: Wait, so you're saying that if we take $50 from Bill Gates and give it to a homeless guy on the street we can't say that overall welfare has increased?!?
Them: Yes.