I suspect that what puzzles Dr Alf in the face of overwhelming evidence of the potential for longevity has a simpler explanation.
Most Americans die penniless and have few savings and health insurance typically ending by age 74, thus longer life cannot be financed or enjoyed except by those who have substantial pensions, private wealth or businesses.
Even then an accident or life threatening condition can mean crippling medical bills making life unbearable and unaffordable in the US.
The UK with the NHS encourages irresponsibility and fecklessness, particularly by pensioners, nightclubbers and recreational drug users and ignorance about cooking, diet, exercise and lifestyle encouragING people to not consider consequences of actions.
When the NHS implodes financially the penny will drop as it already has for Americans.
Dr Alf's Blog 