In the fall of 2007, Countrywide Financial, then the
nation's largest mortgage lender, had a curious new idea -- or, more precisely,
an old one. It would no longer import foreign capital through Wall Street to
make subprime loans. Instead, it would depend entirely on deposits from savers,
who would finance each other's mortgages -- kind of like that humble thrift
institution run by George Bailey in the movie It's a Wonderful Life."