I believe having dual nationality gives them the courage to cover what locals may not be able to cover because they can flee in case of the prosecution from the government. However, I wouldn't call this a Pakistani specific problem, it happens the world over. If you see someone promoting communism or any ideology that the govt is against in the US, I bet the intelligence agencies will interrogate or in extreme cases just vanish that person. There are also many cases in the US where there is a huge amount of cover-up. So I wouldn't call this a Pakistani problem alone. What the author is reporting happens everywhere, West or East.