https://www.oecd.org/eco/growth/46508904.pdf
http://www.commonwealthfund.org/publications/press-releases/...
When people get sick they come to the US for treatment if they can. You don't see world leaders and those with money going to Canada or Europe for treatment. Not when it's dire. The US is hella expensive for many reasons one is that we have the most bleeding edge medical technology.
There are plenty of studies that support his position.
But there are also lots of studies that oppose his position.
And everyone will listen to the studies that support their prior viewpoint and say that the others are bunk.
You could have a good debate about health care if everyone gave up their priors, was willing to listen to opposing evidence, and was willing to accept their preferred system has real honest-to-God not-said-sarcastically tradeoffs. Let us know when that happens.