It says the (self-reported) "very conservative" and "libertarian" respondents averaged 1.30 and 1.38 wrong answers. I would be interested to know the top few questions each of those groups got "wrong", and whether they were "wrong" based on actual factual error or whether their error could be plausibly attributed to a misinterpretation of a few of the questions, or a dispute over the meaning of socioeconomic data on the issues.
edit... looking at the pdf, the top "wrong" answer for both conservatives and libertarians were:
1. "third-world workers working for american companies are being exploited" (libertarian: 29% "wrong", very conservative: 26% "wrong").
2. 21% of libertarians said standard of living has dropped over 30 years (vs 13% of VCs). 19% of VCs said that professional licensing didn't increase costs (vs 13% of libertarians).
3. 20% of libertarians said free trade leads to unemployment (vs 16% of VCs). 18% of VCs said that restrictions on housing development don't lead to increased housing costs (vs 16% of libertarians).
I think it's clear why the 1st question is so often answered incorrectly. It rests heavily on the definition of "exploited", which is a highly emotional term. I think most of the rest of the "errors" are based on legitimate disputes about what existing data actually mean.
Where's the surprise? Anyone who thinks that you can give more people better health care for less money doesn't understand the economics of a lemonade stand.
Cheaper health care that provides more accurate diagnoses, better surgical outcomes, better drugs, etc. (the traditional components of "healthcare")... basically, status quo medical advice and procedures, but with better accuracy and outcomes? I'd agree; that's probably not possible (given current technology) without increased expense. Better average
health for cheaper, however? I think that is quite possible, if a lot of people and institutions -- from insurance companies to medical care providers to government to average citizens -- would shift from primarily thinking about medicine as treating problems to thinking about medicine as trying to prevent problems from occurring. There is some movement in that direction, but not nearly enough imo.