I think that the author is wrong in trying to estimate military force by economy size. What matters in the war is not how many dollars you have but how many sol

I think that the author is wrong in trying to estimate military force by economy size. What matters in the war is not how many dollars you have but how many soldiers, bullets, tanks, bombs you have. And the costs to produce them might be different. In the West its high wages and strict safety requirements inflate the cost of production, but if in your country people are motivated to work for food for the victory then you can produce much more with the same expenses.