IHT: Healthy people more expensive to care for.

"LONDON: Preventing obesity and smoking can save lives, but it does not save money, according to a new report.

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..."

http://www.iht.com/articles/2008/02/05/healthscience/obese.php

Found the above article through Treehugger.com earlier today, it's certainly a shock to me as well, after hearing for years about the purported health savings of not smoking, eating right etc. here is one study (whose methodology I question) that says otherwise.