I have several posts on unintended consequences of government policies, starting with one on November 27, 2010. (Click the Unintended Consequences category to see them all.) I just ran across a book that focuses exclusively on this topic and makes the point that some policies don’t just have minor negative outcomes but actually lead to people dying. The book is Death by Liberalism: The Fatal Outcome of Well-Meaning Liberal Policies by J. R. Dunn. (Amazon).
I have not read the book but have put it on my list to get to someday, hopefully soon.