The cash being spent on the Ukraine war is an overwhelmingly high return investment, not only because it’s funding the US local economy as opposed to that bullshit “We’re airdropping pallets of cash in a warzone!” narrative, but also because of the cost-effectiveness of weakening Russia. A disposable rocket launcher being used to take out a multi-million dollar tank for example.
Even in the scenario that Kyiv is overrun, there is still going to be an active resistance effort. Despite all of their numerous fuckups, Russia is still on the easy part of the war. There’s no such thing as taking a city, stomping your feet and claiming it to be yours, you’ve still gotta hold the territory until there’s a proper takeover without fear of reprisal made easier by, yknow, weapons donated to the effort.
It takes about 1 soldier per 25 civilians to effectively suppress the chance that the local occupying force ends up being vulnerable to the resistance effort. That’s trained soldiers, not just conscripts that have no idea about enforcing shifts just so you don’t end up having your throat slit and your barracks firebombed overnight.
So yeah, those weapons, which are manufactured and benefit the US economy before being sent overseas are very cheap compared to the benefits they bring. Similarly, Russia spends shockingly little to bribe and blackmail Republicans while using troll farms to flood social media with “Bothsides” bullshittery, that’s their high return investment right now.