http://www.news.com.au/lifestyle/fitness/treat-obesity-like-the-disease-cancer-say-experts/story-fneuzle5-1226742615369
So, a group in australia is currently trying to have obesity classified as a disease so that personal trainers, liposuction etc. can be subsidized by medicare.
I personally do not think obesity is anything more than a lifestyle disorder, and in some cases caused by mental health/glandular issues (in the case of mental health/glandular, then by all means weight loss should be subsidised as part of the treatment for that mental disorder).
I am unsure if every person of over a certain weight should have their weight loss paid for, then again I myself do not suffer from weight issues and am unqualified to speak from that perspective.