In the grand scheme of things its what nature does. The ants will help get rid of the weaker things that the current environment can't support and especially help clean the carcass of what is already dead. In return, they'll have a population explosion from the extra food that is easy picking for them. However when the rains come and the environment starts supporting the wildlife better, there will be less dead and weak to feed the ants, so they'll suffer a decline.
Sad as it is, it's just they way things are. You can't help everything. If you did, then nature will come up with an even bigger disaster.