Failed socialism occurs for the same reason as failed states of other ideologies. Poor leadership and governance. I'm not sure what race has to do with this. Are you saying that because there are a lot of Mexicans in the us that single payer health care in the US would look more like Venezuela than Canada?
No, I am saying that you cite only white examples when you argue for socialized medicine and you never mention non-white countries, or what the socialists call non-white countries. What about Russia, China, and North Korea--are they examples of good healthcare?