You should have an allowance (public ledger?) per month with a receipt for everything you spend as this is not your money. Of course it will not stop people from being a fraud but it would a start.
This would certainly be a start.
Also, the ability for people to add amendments to laws/bills anonymously should not be a thing. Politicians on both local and national levels don't care if they add in some fine print or a loophole in some 5000-page document, because even if somebody catches it they won't know who put it in there.
I don't think so, if it is a government.