How would you handle a financially dyslexic significant other after nicely approaching them numerous times already?

I’ve tried calmly reasoning with her.
I’ve tried being angry.
I’ve tried pleading and begging.

What can I do to ensure that she won’t spend us into bankruptcy?
Even having my own account for the majority of our money didn’t work because then she got charge cards . I love her, but she’s making me crazy.. she wants nice things but isn’t willing to help me attain them via wise financial preparation.