If there weren’t nationalized health care, then fat people would not be so expensive. But, even withouot Obamacare, the system in place means everyone pays for unhealthy lifestyles.
I do not see how more transparency and clarity on labels causes harm. To say that it will not work without attempting it, is absurd.
The comparison to energy efficiency labels for appliances is relevant. They have, indeed, been proven to influence behaviour.
I suppose the new labeling would be useful to me, as they would designate foods to avoid when I want something that actually tastes good.