Control Thoughts, question Options

[attack]

I just got back from running a game of SR4 and the Magician of the group decided that she was going to use Control Thoughts to give a NPC the command to transfer all his Nuyen over to her before they killed him. The NPC is a Yakuza underboss, and would probably have alot of money able to be transfered so I am very hesitant about letting her do this. I'm just wondering if there are any messures (in the 2070 banking system/Control Thoughts rules) in place to stop this sort of thing from happening?

With currency being almost completly electronic, what is stopping a Magician walking the street from randomly Mind Controlling people and getting them to transfer money. The NPC would probably have no recollection of ever transfering the money. NPCs that were left intact may be able to trace where they transfered there Nuyen too, but this still leaves a major problem if the NPC is killed. Your thoughts?