To be fair, she thinks that bed sheets with skidmarks on and bloodstained knickers are 'Art'. She can't be firing on all cylinders.
Shouldn't she have 'someone to look after her'?
A bit like JK Rowling, she wrote Harry Potter whille she was on the dole.Don't know much about her but I imagine that in common with a lot of artists, musicians, actors, that work was very scarce before she got her big break.
And before that break she was living of the state - and now she has had the break and earning money she doesn't want to contribute to the country in recognition of all the support she has received from it in the past.
I don't know this for fact, but just my perception of many media\art types in general.