There are women who love to do that. This girl currently isn't one of them. You can:
A: Go game only girls who are the type that likes to treat men
B: Try and shape this girl into the type that likes to treat men
Option A requires you to learn who these girls are and where they are in your city. They are the types with careers and stuff who are more modern in their views on relationships and dating.
Option B requires for you to learn how to shape women. You'll have to keep employing the techniques each and every time you see her until you start seeing the change in her behavior.
I'm sure guys on here know advanced hand gesture anchoring or other advanced shaping methods, but I like 3 simple things.
I ask her a question about the quality. "I saw this girl pick up her date's check the other day at xyz restaurant. It's amazing this day-in age we live in, what do you think?" I just came up with that so it obviously could be improved.
Seems like you asked her about it already and she responded with "Fuck you! PAY ME!" Apparently men buying her things is part of her value system
I'll tell her about a friend who already has the quality. Tell her some story about some girl who treated you to a great time or what ever. Every time you see her that friend treated you to something else! Make sure the stories has a nice beginning middle and end. They should at least be 3 lines long.
The third method I use which may or may not work is telling her she has the quality directly. This girl seems like she'll respond by denying the quality entirely. What would I say for this.. "You seem like the type who takes care of herself, but at the same time you can enjoy treating others to a great time.

" I just came up with that, but I'm sure a girl would eat that up delivered in the correct context.
Anyway, all credit goes to Vin Dicarlo.