People like to rip on the US war machine, but as far as percent of GDP, the US isn't even the biggest spender. Also, the entire world benefits from the US army, which helps protect global trade routes. For example the US patrols for pirates off the coast of Africa, protecting ships that are taking goods from one country to another in which the US has no involvement in any of it.
>but as far as percent of GDP, the US isn't even the biggest spender
The great thing about statistics is you can maneuver them to support your conclusion. Here's some that support mine: in real numbers, "The United States spends more on national defense than China, India, Russia, United Kingdom, Saudi Arabia, Germany, France, Japan, South Korea, Italy, and Australia — combined."
