Your US numbers are very weirdly off. I've never seen someone try to claim US defense spending was 15% of GDP. US military budget: ~$700 billion, 3.4% of GDP.

Your US numbers are very weirdly off. I've never seen someone try to claim US defense spending was 15% of GDP. US military budget: ~$700 billion, 3.4% of GDP. US GDP will be close to $20.50 trillion for 2018. Your 15% figure implies a GDP of about $4 trillion (close to the size of Germany's economy). The US will add roughly $1 trillion to its GDP figure in 2018. That's nearly the size of Mexico's entire economy (15th largest economy), added in just one year.