These are some interesting thoughts, keep them coming guys!
Our whole "chore system" is that they each have 5 daily chores: #1. Tidy room #2. SHower & Brush teeth #3. Their laundry #4. One house chore and #5. One pet chore.
The house and pet chores are on a list every afternoon (different stuff according to what needs done, a lot like HEChicken's plan) they can choose and do the ones they want -- first come, first served.
That gets them to $5 (DD 11 stops there.)
For DD 14 to get to her $7 she adds #6. Dishes 3 nights a week and #7. One more house chore from the list
DS gets to $8 by doing 6 & 7, then #8. One more house chore.
So, yeah, maybe she would trade off doing one more house chore, to her brother, and he takes dishes for 6 nights --ehhh, not sure he's going to go for that, she might have to take 2 house chores.
I really think that it's a case of negative attention is still attention, and when she's doing this it gets the whole house in a tizzy.
Not cooking really isn't an option because she will let this pile up for a week or more. We've had to wash silverware to eat dinner before and she still doesn't care. So that's a little long to go without food.
I like the idea of babysitting her, but to ramp it up a notch - have DH do it. He works nights and is usually headed back to bed for a few hours before work about the time this is going on. So if he was sitting there all grumpy and she's keeping him from getting sleep . . . . . . that might light a little fire under her butt