Super, you could be correct.
I expect the NATO nations themselves will have trouble increasing defense spending much. Increasing defense spending will mean cutting elsewhere. Those cuts will be unpopular.
All but 6 NATO nations (Poland - 4.12, Estonia - 3.43, USA - 3.38, Latvia - 3.15, Greece - 3.08, Lithuania - 2.85) spend less than 2.5% of GDP on defense. Four of the nations that spend the highest percentage either border Russia or are damn close to it AND remember decades of Soviet rule. Finland is 7th at 2.41%.
Getting a majority of NATO nations to 3% will be nigh on impossible. 4%? 5% is laughable.
The UK spends 2.33; Germany spends 2.12.
Doesn’t Germany have an industrial policy?
Doesn’t it have highly competent defense companies (Leopard tanks, Puma armored vehicles, Heckler & Koch small arms, ammunition manufacturers, cruise missile programs and production)? It doesn’t have anything major in terms of helicopters or fighters/bombers.
Does an industrial policy based on defense spending produce net gains? All those munitions used during training or war are gone.