My suggestion is to add the option to change or completely disable the money dropped by each mob kill.
We are testing this mod in a public server and the amount dropped by mobs is single handedly ruining the economy.

This isn't a feature that currently exists. Moneta is only generated when players log in and when players get achievements. It is transferred between players when one kills another.

Can't this be a bug then? Because its happening in our server at the moment.
It seems it is confusing the mob kills for player kills for some reason. Even when the player kills feature is disabled.

I would guess it is one of your other mods that changes something. Another option is that when you kill mobs you could be getting advancements somehow (likely modified by some other mod if this is the case)