800 Billion is something.But money alone is clearly not enough.
Enough for what? For the proxy war with Russia? Maybe. But that was not the plan. The US regime's plan was to force Europeans to increase their war budgets which is the money they will spend on purchasing weapons from the US arms dealers! So the plan worked very well 
If Trump's plan was to have European countries step up their purchases of weapons and military equipment from the US, then it can be said that this plan failed miserably. After Trump and his team began to threaten their allies with economic sanctions and even war, Europe realized that the US is an unreliable partner and therefore it is dangerous to use American military equipment. After all, military equipment now contains electronics with numerous software controls. For example, in order to put pressure on Ukraine, the US turned off some functions on air defense systems and aircraft, as a result of which they at least lost their effectiveness. Therefore, Europe began to think that if the US wanted, it could make it so that, for example, the American F-35s supplied to them might not even take off. Then why would they take such a risk?
There is a way out and it is that Europe will build its own factories to produce its own military equipment, and will now gradually get rid of the American one.