The US has had a GDP advantage since the second world war. But since then much of the EU has rolled out socialised medicine and more workers rights (maternity leave, mandatory vacation, even a higher minimum wage) and they haven't slipped down the rankings as a result.
Understanding why the US's GDP is as positive as it is is a much bigger topic that takes us into areas like natural resources (e.g. oil, metals, etc) but also history (e.g. World War 1, world War 2, even the cold war).
It is a pretty weak argument to dismiss all of the article's points just by repeating "but GDP!!!" over and over which is more or less what your post is.
Understanding why the US's GDP is as positive as it is is a much bigger topic that takes us into areas like natural resources (e.g. oil, metals, etc) but also history (e.g. World War 1, world War 2, even the cold war).
It is a pretty weak argument to dismiss all of the article's points just by repeating "but GDP!!!" over and over which is more or less what your post is.