US aid seems bound by the willingness to spend money and escalate. EU aid seems bound more by the industrial capacity and willingness to escalate.
Still, just "willingness to escalate" would move the needle by a lot, and I'm of the opinion that the only language dictators truly understand is violence. Anything short of that is far too often interpreted as a show of weakness.
This.
We need a grey flag to clearly represent "we don't accept your win yet, but we are not trying to win either, so keep trying". Just as the white flag clearly represents full surrender.
It is, unfortunately, the optimal path for maximizing the length of the war.
Nobody wins wars without prioritizing the goal of winning the war.
Other massive disadvantage: The unending financial arm twisting is pushing allies with closer ties to Russia away. I.e. India. The longer the war goes on, the more global adaptation there will be away from the systems that create US leverage. Leverage should be used strategically, within a decisive plan, not chronically and aimlessly while its targets build up immunity.