Why is per capita GDP in Western Europe so much lower than in the US? Mankiw seems to imply that high tax rates may be one of the reasons. … So I think Mankiw is saying that if we adopt the European model, there really isn’t a lot of evidence that we’d end up with any more revenue than we have right now. … Of course the progressives’ great hope is that we’ll end up like France. But Brazil also has high tax rates, how do they know we won’t end up like Brazil?