“It works for them so we might as well crash the party”
It only works for them because they hardly spend a dime on defense. I think it was Churchill who said, “We can have a strong military or we can have a socialist state. But we can’t have both.”
We’re doing the same thing. We’re reducing defense spending. I see no reason for us to do more than minimum to protect America from an unlikely foreign invasion. In any case, there’s not much we can or should do about Europe.