Earlier quoted context omitted.
What surprised me about the article was that I didn't see much 'capitalist drum-beating'. His argument is that the performance of Argentina versus the US can be entirely explained by education levels. Schools are typically provided by the government, and the idea of universal education was initially regarded as a radical one, often associated with early socialists. I'm not sure if I agree with the hypothesis, but I'd…
In fact, he does mention Peron's protectionism being a root cause (along with depression and wars) for Argentina's financial woes today. He states that protectionism, regulation, large state enterprises (which are anti-capitalistic themes) have never been 'particularly good for growth'. I feel he does start of with the capitalistic premise. Only later is education hypothesized as a major culprit.
I wouldn't disagree that he's starting from a standard narrative, but his argument doesn't require those causes as premises to explain Argentina's lack of growth.