Walmart is trying to start their own bank. Here is a good summary of the issues involved in this sector: AP Story
While this has been going on quietly for years -- there are now 61 industrial loan corporations in the country -- Wal-Mart's bid to establish one has galvanized opposition to the world's largest retailer. The proposal has riled small-town banks who are worried the retailing behemoth might cut into their business the way it has mom-and-pop retailers with its sheer size, aggressiveness and ubiquity. When Wal-Mart rolled into town, it brought the closing of 555 grocery stores around the country, 298 local hardware stores, 293 building suppliers and 116 pharmacies, according to the AFL-CIO, one of the numerous opponents.