I am sad to say this (enrichment of the leaders on the Palestinians account) was true even before hamas.

Suah Arafat (Yassir Arafats wife, he was head of PLO) is a very prosperous woman. It took a couple of days between Arafats death and the announcement, because she had to have all his money transferred to her name. He didn’t personally earn anything in that scale.

Regarding elections - hamas used to literally run over fatah (its opposition) demonstrations with pickup trucks