A bit of a digression, but…First off the USA is the most populous developed country. A lot of the points raised here, like foreign aid, immigration etc. is basically total numbers. A result of having a bigger population, when the numbers per head iare nowhere near the top.
Seems to me that if we are looking for a hypothetical US decline in relation to other nations, a per-head measure makes more sense.
Um, no. Actually, hell, no. This seems to be an issue of perspective and scale.
Last numbers I remember, 2009, Germany, the UK and Frances total military budgets were bigger than the total budgets of Russia and China. If the US evaporated tomorrow, the remaining EU/NATO countries would have something like a third of the military speding of the planet.
The EUs military spending is vastly overengineered for any potential threat. And if the EU wanted greater military power, coordinating current spending would yield much better results.
Ony from the perspective of US military spending could the EU spending possibly be regarded as anything but massivly over the top.
The US spends just under 5 % of GDP on its military. Major EU nations spend between 2,5 -1,5 % of GDP.
Meanwhile, the US spends 18 % of GDP on healthcare. The western EU nations average 9 %, with mostly better outcomes. That difference is 3 times the difference in military spending. In fact, the waste in US healthcare is almost twice the entire US military budget!
European social programs are built on more efficient healthcare not less military spending. Military budgets are just not on the same scale.