The way I see it, so called 'Pay Day Loans' are somewhat self defeating.
If you borrow say £100 till payday you then have to pay back about £125 say, so then you are £125 shorter on your next months budget, and so it escalates, unless you cut back on things for a while to get back on track. Unfortunately for some people it becomes a bit of a habit and they get more and more into debt.
The same applies to those people who live on their overdraft and never manage to get ahead. In my younger days overdrafts just weren't available to most people, and it was a bit of a stigma to go into the 'red', something I have never done in all my life. If we didn't have the money we went without until we could afford it. We were never well off but always had enough through prudent budgetting, and in later years managed to put enough away to now have a retirement with no money worries.