The U.S. government also spends more on healthcare per capita than Canada [1]. Seems pretty socialized to me already. The U.S. government is a corrupt piece of shit. Passing laws mandating health insurance for everyone isn't going to fix things.
That chart is admittedly pretty terrifying. But the article itself argues the big reason is because Canada's nationalized healthcare plan has more leverage and price control capabilities than US Medicare. That seems more reasonable than simply attributing it to corruption.
[1] http://www.slate.com/blogs/moneybox/2013/01/23/chart_us_gove...
EDIT::
Furthermore, diseconomies of scale are not just Austrian Economics voodoo.[2]
[2] http://en.wikipedia.org/wiki/Diseconomies_of_scale