It's like "Reefer Madness."  Full of fantasy.  Divorced from reality.  Michael Cannon draws our attention to a seven-year old study published by the Urban Institute.  University of Chicago economists Helen Levy and David Meltzer review all of the literature up to that point and conclude:

There is no evidence at this time that would allow us to say whether money aimed at improving health would be better spent on health insurance or on inner-city clinics, community-based screening programs for hypertension, or advertising campaigns to encourage good nutrition, to name just a few possibilities.

See also my Health Alert on this subject.