May an expat weigh in on the future of the National Health Service in Scotland (Poll:

NHS is the key to win female vote for Yes, News, August 17)? The health service is the last that should be a for-profit enterprise.

The United States is a stark and sobering case study of the pitfalls of privatised medicine. We spend $9000 per capita on healthcare, by far the highest in the world. In 2012, total health care expenditures were some $3 trillion, fully 17.5% of the total US gross domestic product. Yet we rank abysmally low globally in terms of life expectancy (50th of 220 countries worldwide and, more significantly, 27th of the 34 advanced industrial nations). The US leads the developed countries in incidences of heart and lung disease, infant mortality, and sexually transmitted diseases. In all, the world's richest nation suffers at least 50,000 unnecessary deaths per year simply through inadequate healthcare provision.

For upper-income Americans, healthcare is excellent, in terms of available screening, diagnosis and treatment. The reason for the glaring gap between money spent on research and treatment and the population's state of health is the lack of affordability of healthcare for lower-income families (by some measures, 40% of Americans are uninsured or under-insured, and President Barack Obama had a long, bitter fight to bring in what is mockingly referred to as "Obamacare" - the Republicans are committed to overturning it). This lack of fairness and access is inevitable in a system geared to maximising profits over quality of care.

The commitment to a social contract that is under dire stress in England, and to which the Scottish Government seems committed, is a compelling reason to vote Yes. I say to Scots: be afraid, be very afraid, of a for-profit health system.

David C Speedie

Senior Fellow

Carnegie Council for Ethics in International Affairs

New York