Why healthcare in Great Britain is less expensive then in the U.S.

Because it's not as good.

(NOTE: I've posted about this in the past - for example here   Cancer outcomes in the U.S.A vs. the U.K. - and other countries and here England news headline: "Shortage of family doctors leaves healthcare in crisis").

Now here's a recent Guardian (UK) feature.

Almost half of cancer patients diagnosed too late

Almost half of people who get cancer are diagnosed late, which makes treatment less likely to succeed and reduces their chances of survival, Cancer Research UK warns on Monday.

In a report, the charity claims that 46% of all patients with cancer in England have their disease diagnosed when it has already reached an advanced stage.

The findings have highlighted the worryingly high rates of late diagnosis, and consequently poor survival, for people with many types of cancer in Britain ...