So your dad is a doctor?.
Becoming obese is usually a sign of other unrelated mental conditions (normal well adjusted people don't often get so fat they can't get around any-more)
I not defending them, I'm simply pointing out the flaws in your argument & highlighting that irrational emotionally unstable attitude you have towards this person.
Stop reading the daily mail.
http://en.wikipedia.org/wiki/Irony
You have zero understanding of the situation, he's discussed with my dad how he does it so he doesn't have to work, when they started to clamp down on this kind of behaviour, he even tried to get my dad to help (which he didn't, thank god). I think the 'he's known him for 30 years' part might hint at that.
Then again your another professional nerd trying to play the part of the amateur psychiatrist, with a nice serving of a polarized, morally righteous babble.
I've never been near the Daily Mail.
Man works the system, engineers his life around claiming benefits, despite having no kind of illness until recently, people defend him and claim that because he falls inside the rules, he's entitled to it. Then the people with brains wonder why this kind of **** happens? He dedicated his life to beating the system and having an easy ride, and he did it, something he seems to be proud of. Although feel free to carry on trying to play the smart guy, it'll only make the members with an actual brain lol at you.
Although I'm gonna take a guess and go with the fact you most likely don't work.