Debunking Conservative Myths, Update 2
Here is an estimate that says that the share of government spending on Health Care is much higher in the U.S., nearly 60%. The 45% figure previously cited doesn't take into account the role of health care related tax subsidies or expenditures for the insurance of public employees.
The additional 15% erases the difference between Canadian and U.S. government expenditures, per capita.
Let's review. Our government already pays the same amount per capita as Canada, but somewhere around 44 million people (2002) are without insurance. Additionally, we spend about $2000 per capita privately (employers and employees, mainly), yet we trail Canadian overall health incomes (according to the WHO Health Report 2000).