"Human capital is perhaps the single most important long-term driver of an economy," Ms. Strauss writes. "Smarter workers are more productive and innovative. It is an economist's rule that an increase of one year in a country's average schooling level corresponds to an increase of 3 to 4 percent in long-term economic growth. Most of the value added in the modern global economy is now knowledge based."
"And while America does spend plenty on education, it funnels a disproportionate share into educating wealthier students, worsening that gap," she said.