Is it morally wrong to give money to Taliban fighters in the hope they will lay down their arms and 'join the other side'? Yes. Afghans will be happy to accept any monies offered to them from anyone. That's called survival.
Hamid Karzai announced he would be inviting Taliban representatives to a peace council in the spring, the first for eight years, followed by another international conference in Kabul. More rhetoric followed by requests for more money possibly.
It is also morally wrong to have our troops there fighting this lost cause. Afghanistan cannot be governed by a central government. History proves that.