Benevolence is performing kind, charitable acts, from a desire to do good. It implies that you do not ask or expect payment in return. And it would intrinsically apply to people, not countries. A fireman might help you regardless of being paid or anything other than the desire to do good. But international diplomacy and politics leave no room for benevolence.

You're saying all the US leadership chain (the people with the authority so decide strategy) agreed to spend billions extra just as a charitable act for another continent. The only way I can take the best interpretation of this is to assume you're joking.