@adamtooze argues in the FT today, given the shifting of the global political tectonic plates (my term not his), Europe needs to move from national re-arming to the development of a proper European military force (funded by joint debt issuance on its behalf).
In the wake of US' growing unreliability, Europeans can only rely on themselves for security.
A European Military Keynesianism may look like a major project but its logic becoming inescapable.