> Note that GDP does not directly translate into a number of tanks and missiles produced. I doubt Italy has more weapon than Russia.

Not wrong, but GDP is a rough metric of economic and industrial capacity. So if Italy wanted to, it could convert its economy to produce tanks and missiles at a similar rate as Russia is doing. And Italy is just one member of NATO:

* https://en.wikipedia.org/wiki/Member_states_of_NATO

If the economic capacity is in "the service sector" it's going to be just about meaningless in a war.

yes all those guys selling drinks on the beach can just take a bus to the tank factory.