Rationing health care

What health services should governments pay for? Who should receive transplants or expensive procedures? What services should be available through private insurance? Should there be a two-tiered system? And, how do we decide on what services to publicly insure/fund? Many governments around the world are facing such questions. In Canada, the Government of Alberta and the Reform Party of Canada have recently expressed the need to re-think which health services are publicly funded, or the "comprehensiveness" of Canada's health care system.