It most certainly is medical treatment. The Supreme Court of Canada has declared Fluoridation to be enforced medication. SCOTUS has not ruled on a case yet. 
Aside from that, the Flourosilicic acid put in your water is a known toxin. Read the MSDS here http://kcindustries.com/msds-fluorosilicic-acid/
Fluoridation claims to help the young and the elderly but those are the groups that it attacks the worst. The MCLG (Maximum Contaminant Level Goal has been found to be set too high. Flourosis (Aesthetic) occurs in +/-15% of children at levels of 1ppm and 4ppm is not effective protection against severe Fluorosis. This does nothing for your old bones, believe me. 
Read "Fluoride in Drinking Water. A scientific review of EPA Standards (2006)" Chapter 11 is "Drinking Water Standards for Fluoride"  http://www.nap.edu/read/11571/chapter/11
You call this a health and economic benefit? When we have Fluoride, the right kind, in the Elwha river - FREE?  You have strange criteria for benefits.