They win anyways in the US at least. They borrow from the fed which means that they can take a loan out at a lower rate than they give you and pocket the difference. Then if it was not enough they can resell and repackage loans and let some other sucker deal with it. Annnd if that not enough they can create derivatives on packages of the loans (2008 was example of it blowing up) and sell those. And for icing on the cake if they somehow fuck it up (as they have in the past) they can get bailed out, give themselves bonuses and do it all again