For the health care policy wonk on your Christmas list, David Gratzer's The Cure: How Capitalism Can Save American Health Care, and Arnold Kling's Crisis of Abundance: Rethinking How We Pay For Health Care are must-haves. However, most health care policy wonks probably already have them, so that leaves the people on your list who have an interest in, but are not obsessed with, health care. Fortunately, these books are not as wonkish as you might think and so will be popular with them too.
Gratzer is a psychiatrist who grew up in Canada. Having seen Canada's dysfunctional single-payer system first hand, he notes that Canada is now moving toward more privatization. He points out the shock that, at the same time this is happening, "in the United States they have been moving in exactly the opposite direction." He warns that moving toward more government intervention in health care is like watching a car accident unfold, "a series of small events, leading to a spectacularly disastrous end."
http://www.spectator.org/dsp_article.asp?art_id=10733