OK, Germany, France, the UK, Poland and Sweden aren’t pooling zero, but it isn’t too far removed.
The American Enterprise Institute warns of the “challenges” for European defense in the face of looming defense cuts.
The basic challenge is pretty fundamental and self-evident: they won’t be able to defend themselves or fulfill their security obligations.
What will it take for all this to change? Some sort of European Pearl Harbor or 9/11, I’d guess.