I have taken a long break from WFRP since my previous campaign ended last summer and I have finally come back after playing a bit of D&D. This time around I let the players choose their careers. So one of the players is an agent and the other is an Apprentice Grey Wizard. In the adventure I ran I had the party investigate a Khornate cult in a farmer's corn field. I had the town watch pay them 20 brass pennies each for helping save one of the mayor's servants from the cultists.
The players think that I am not giving them enough money and think I should give them lots of shillings or gold crowns. I have explained to them that not many people in the old world are that rich. So they have taken matters into their own hands and have decided to cast an illusion spell that would turn all of the pennies I have them into gold crowns using one of the grey wizard's actions. They know the spell will wear off so they plan to go to a bank and ask for change for their fake gold crowns in shillings. The wizard is also planning on using the doppleganger spell to turn into a merchant so no one would know it was him when the illusion spell wears off.
After that they plan to skip town and spend their new fortune. I have no idea how to stop this. I have thought about using witch hunters with magical sight to investigate and possibly have the Grey College look into the situation. Does anyone on the forums have any idea on how to stop the characters from becoming rich too quickly? Should I let them get away with it?
