I won't ignore it, but I will suggest that there's more to the equation than "it's cheaper to import."
Williams himself notes that local workers get hurt by free trade -- a rather stunning admission for him, actually, since he used to gloss over that.
More to the point, however, it is not particularly comforting that our quest for "cheaper" has led to the export of large sectors of our manufacturing capability to our most likely global rival.
Economics is fine -- but it's not the only thing that matters.
You conveniently ignore the other half of the equation that far more economic damage is done by restraint of trade and protectionism. eg every sugar job saved cost consumers $826,000. That's about $800,000 per job that could have been used for other things - real dollars wasted.