I don’t think that’s a valid question. What would they do with money? Buy more weapons, I guess? Invest in training. Hire more recruits.
The failure is not in money, training, or conscription. The failure is in not giving the army any reason to fight.
If you don't give a rat's ass about your cause, and there's a serious possibility of defeat, why would you keep fighting?
The problem is that in twenty years, the coalition-supported government failed to make enough of its constituents give a rat's ass about their cause. They might not like the Taliban much, but they seem to prefer to live under them, than die for what is perceived as a corrupt, self-serving, ineffective government.
> If you don't give a rat's ass about your cause, and there's a serious possibility of defeat, why would you keep fighting?
Keep fighting? My understanding is that there was no serious effort to fight from the army's side.