This is great stuff:
LONDON - Preventing obesity and smoking can save lives, but it doesn't save money, researchers reported Monday. It costs more to care for healthy people who live years longer, according to a Dutch study that counters the common perception that preventing obesity would save governments millions of dollars.
In a paper published online Monday in the Public Library of Science Medicine journal, Dutch researchers found that the health costs of thin and healthy people in adulthood are more expensive than those of either fat people or smokers.
(Full disclosure: I'm a man of substantial size, though my size is not nearly as substantial as it once was. Perhaps, for the good of society, I should order a pizza.)