Counterfeit cash adds risk to your agents. It also increases the chance they'll be tied back to you if they're caught. Also the operation to get them the money

Counterfeit cash adds risk to your agents. It also increases the chance they'll be tied back to you if they're caught. Also the operation to get them the money is, in itself, an expensive and difficult operation where the people doing the work probably need to be paid in real money. None of those drawbacks mean it's a bad idea - just that it's not simple and ultimately comes back to fundamental questions of value exchange. I.e. Most of the time it costs fewer resources to exchange things for money on the black market than arranging to have extremely high quality forgeries in the hands of your agents.