First, I checked out very briefly some of Chapman's writing and he doesn't strike me as a ideologue. He does harp about the innovation and lowered costs that capitalism provides. Partially true in that you may get a lot of value but prices increase, lots of tricks are played by providers, and capitalism usually has a much higher priced (salaries) than the public sector.
Second, usually I temper anything I see coming from the Univ. of Chicago due to its very conservative nature especially in economics. This poll makes sense to me though.
Overarching- I think there is an element to "millennials" (actual millennials are in there mid 30's) that a lot of people miss. They've grow up with something I didn't - their own ability to gather information at lightning speed. Frankly they are far more informed than I was growing up. Especially in a hyper active news/political world the words on TV and print can easily be checked and researched in real time. Individuals can develop their own understanding of a topic cutting through the rhetoric. I'm not saying that everything is some wild conspiracy theory but the news routinely skips over important steps in a story in order to keep it alive. Millennials also came of age in the midst of one of the great orchestrated lies in history - The War on Iraq - that was actively facilitated by the media. It could lead to skepticism but I think it showed a lot of people that they have to do their own research which millennials accept as a given.