Governing the occupation costs whether the US Israel or PA administers. Right now, the PA and US are paying the governing costs. But Israel retains the occupying and governing authority. US and EU aid only anticipates a free and independent Palestine. If that is not going to be created by Israel, then you should pay the costs.
Italian FM arrives in Iran to promote economic, political ties (Reuters)
from the article: 'Abbas willing to give up U.S. aid for unity with Hamas'