He is an extreme and " prime example", as you put it, and I am just as unhappy as other forum members may be about his ingratitude to those treating him at taxpayers' expense. But sadly he's not the only one.
Health service workers can't - or shouldn't - make arbitrary choices about who to treat depending on whether their conditions are "self-inflicted" ! No one actually working in the health service sets limits such as a BMI (body mass index) below 30, alcohol consumption less than 21 units (men) or 14 units (women) / week, smoking no more than 10 cigarettes a day, no illegal drugs, not having vaccinations, no dangerous sports, and no other irresponsible behaviour, before doing their best to treat the patients. We may feel exasperated enough to rant about it, but given the actual reality, we don't refuse to give the best possible treatment. How much better than in the Philippines where decisions to investigate and treat are made on whether or not the patient can pay.