I beg to differ. In a world of fraction-reserve banking, banks are in the business of capital aggregation and debt issuance - in order to generate all important "spread". But, that world - the world for the past ~700 years - is disappearing.
We live in a world with collapsing credit spreads and Basel III will tighten them even further. In the US, Dodd-Frank's prohibition on lots of fee based income (which was a huge profit center for banks) and the disappearance of debit inter-change due to Durbin makes banks very concerned about the future of their business.
Banks are increasingly turning to transactional systems to make money.