My party ran into a succubus (random encounter, she was disguised as a human) while she was out walking her sphinx. Actually she was out looking for them, because they claimed a hex she wanted to control. Her intention was simply to offer one of them a profane gift and slowly work her way in, to eventually destroy the party from within as revenge. However, one of the party saw through her disguise and pulled a weapon on her, so she dominated him (for eight days) and gave him the profane gift. The rest of party didn't make their Sense Motive checks to realize he was acting strangely, and the succubus walked off.
So now I've got this succubus controlling a party member, an Investigator named Monty. The kingdom round is 3 days away and that Withdrawal step looks tempting. If he withdraws all 18 BP from the treasury, at best the kingdom has 1 unrest and the succubus gains 36K gp. At worst the party also fails the loyalty check (I think they have to roll 7 or higher on a d20) and ends up with 19 unrest, one step away from exactly the kind of destruction the succubus wanted. And the succubus can simply run away with all that gold.
Is this a good plan? Monty is Dominated and has a Profane Gift, so she can see everything he does, speak to him from any distance, and he has to do everything she wants unless it is against his nature or directly threatens his life. He's the Royal Assassin, so I believe he has to convince the Treasurer to withdraw the build points, but he's built for that kind of deception.
Bonus question: assuming magic items are more transportable than gold, what should the succubus have him buy for her? Again, the build points can be withdrawn for 36K gp. The kingdom base value is 2,200 gp, though I allow them to buy things from metropolis cities outside the kingdom (base value 16K gp) for a 10% delivery fee. I'm considering items such as: a Ring of Retribution, a Decoy Ring, a Security Belt, or maybe some Improved Shadow Armor. What else would a succubus love to have?
Keep in mind that the BP aren't directly gold, nor is it likely they're sitting around in a huge pile that any councilor can simply stuff in his pockets and walk away.
The Kingdom round happens over the course of a month, so there's plenty of time for other people to notice that Monty is (literally) emptying the kingdom treasury.
Simply walking off with a big pile of gold seems a bit low-key for a succubus. Why not have Monty argue for building up the claimed hex that she wants, filling it with a farm or a settlement full of people she can manipulate and control? Stir unrest until the PCs own new city defects against them, rendering her the queen of a city someone else paid to build for her?
I'm not sure taht a succubus can give her profane gift to a dominated creature.
Nevertheless, stealing tje money is a good idea bit may be complicated as the dominated PC is not the treasurer. What she could do is to use the dominated PC to get a place in the government for herself or a NPC who was willing for her profane gift. Like this, she could gain sone influence on the kingdom and could try to take it for her while tje PCs are away.