Isn't one big issue for homeless people that they need an address when applying for jobs, bank accounts etc. and don't have one. Maybe a place to help them, not only find an apply to jobs, but to use as an address, shower before the interview etc.
When I try to make purchases online with debit card they often use address for verification and if it's incorrect the purchase fails. Not 100% sure it's necessary just to have a bank account though you may be right.
