Is it dead Americans or dead Afghans that are greater policy drivers? America has money. What it may lack is the political will to make the policy work. Spend gold, not blood.
So the idea being, arm and train whatever Afghans will join the government lavishly so they can fight a real civil war to the knife against the Taliban?

How do you get around the problem of local actor commitment when you signal that your own is failing by withdrawing forces?