Really, really, really doubtful that correlations between national IQ and, well, anything prove anything besides that certain countries are generally better off than others. That correlation is probably just differentiating First World countries from Third World countries in general—the First World has better health and education, and also better government.
The paper you are referring to—reference 3 - “Estimating state IQ: Measurement challenges and preliminary correlates”—is looking at variation over US states, e.g. Alaska, Alabama, … not countries. You should re-write your comment taking this into account.
The paper you are referring to—reference 3 - “Estimating state IQ: Measurement challenges and preliminary correlates”—is looking at variation over US states, e.g. Alaska, Alabama, … not countries. You should re-write your comment taking this into account.