NATO is pushing a commitment to a minimum of 5% of GDP on defense.
Which, admittedly even the USA does not do. But in the 60s it was north of 9%.
Most of the cost of things is the embedded cost of labor. Even minerals in a lot of cases. There are a lot of deposits of pretty much everything we could be mining but aren't because of the cost.
One business may only have 25% labor costs, but the suppliers also have labor costs, and their suppliers, all the way down the line. And 25% is on the low side. Even rent has labor costs embedded.