One could see an exceptionally high tax rate on the wealthy (e.g, the powerful) providing a lot more pressure to end the war more quickly. The flip side is that

One could see an exceptionally high tax rate on the wealthy (e.g, the powerful) providing a lot more pressure to end the war more quickly. The flip side is that a ton of spending on war increases wealth for everyone who owns businesses supplying the war. If it’s true that money motivates rich people to lobby for the option which makes them richer, maybe a high tax rate for war could balance the incentive of profiting from war. Of course, that would never happen in this scenario, because the rich would lobby against it, but it’s still interesting to think about how to incentivize us to stop going to war.