Angelina i don't really understand the discussion. when you rent a flat or a house, the landlord usually asks for proof of income to check that you earn enough money to finance the flat, is that different anywhere else?
In the US, at least where I am, they ask for proof of income, proof of who you are, a security deposit in case you skip out or cause damages and the first payment must be drawn on a bank, not on your personal account, to make sure the payment is good.