I'm setting out my thoughts on points raised within this thread:
I'm not sure the financial crisis in the NHS is entirely due to government restrictions. When there was a discussion about renationalising the railways, I pointed out that nationalised industries waste millions, possibly billions these days, in inefficiency, jobs for life, inflated salaries at the top, golden handshakes, poor resourcing choices, bad management etc. etc. (e.g. Network Rail, HMRC, the Civil Service). This applies within the NHS right now. It probably applies to a lesser extent in the private sector because profit is the guiding principle. Profit and waste don't go together.
In surgery, anaesthesia is a risky business. The heavier you are, the more anaesthetic is needed, probably for a longer time. When there's visceral fat, it can make surgery more difficult, although slim people may well have visceral fat surrounding their organs.
I've read that exercise plays a very small part in weight loss. Exercise helps but calorie restriction is what works. If a person's mobility is restricted, sadly, they need to reduce what they eat.
GPs are being encouraged (probably financially) to raise the issue of weight with their patients. In the past, many have been embarrassed to approach the subject. Patients are offered help to lose weight. GP training should perhaps focus more on prevention. Our medical system works largely on shutting the stable door after the horse has bolted! GPs don't usually see patients until there's something wrong. It's bound to be easier to stay slim than to lose weight.
Education plays a part too. There again, it's difficult for teachers to approach the issue of healthy weight when there are overweight children in the class. Parents need guidance on what is an appropriate diet and portion size for a child. I read once about a woman who weaned her baby on chip shop chips. Not surprisingly, the child was obese.