Oh wow @Wewearpinkonwednesdays yours is the thinking that some of these need get their mindset at.
However, as others have said, the system is there for you. The wait to claim can be horrendous with no money. You don't want to find yourself at home with no money and then making the claim.
Yes, they give an advance, the repayments will come out of the first UC pay and until every penny is paid back. And considering everything has to come out of the £73.10, there's realistically nothing there you can afford to lose.
Those bleating on about it's not fair. £73.10 is your JSA weekly figure. From this, you have all your utilities to pay, top-up rent, council tax, food, toiletries etc. There's not enough, to begin with, never mind having to pay back the Advance they so generously lent you because, for some reason, this shit system can take a lot longer than 6 weeks to process. you claim.