Many advocates of health-care reform are admirers of Canada’s state-run, no-opt-out, single-payer system. Indeed, in 2003, President Barack Obama voiced enthusiasm for such a health-care program. Proponents of Canadian-style health care should meet Cheryl Baxter, a Canadian citizen who waited years for hip-replacement surgery, only to be told that her operation would not happen any time soon. Instead of waiting, Baxter did what an increasing number of Canadians are doing: She flew to a …