> That's because the US also defends the free world.
The US invasions of Afghanistan, Iraq, Libya and Iraq have sure helped defend the free world. How many trillions went into those combined? Fantastic return per $ of "free world defense".
Don’t forget Ukraine!
Consider all the US bases in Europe, there to defend Europe against Russia. And the bases in the Pacific and Japan. Greenland, too!
When I lived in Germany in the 70s, we were driving on the Autobahn one day, and I saw a jet hedgehopping at full blast over the countryside. I asked my dad what was going on, and why didn't the Germans complain about it. (Hedgehopping is how you avoid radar detection.)
He replied that the Germans didn't particularly like it, but they understood the reason for it. We were in Wiesbaden because my dad worked on the US base and their job was to ensure that there wasn't going to be nuclear combat toe to toe with the Russkies.
Later on, we lived near Luke AFB in Arizona, where Luftwaffe pilots were trained. I'd ride my bike out to the flight line and watch those glorious F-104s blast off with their afterburners lit up.