Time to bring your money in-house

I see there's an argument raging about where to host email, with a vocal minority vehemently in favor of keeping it in-house. Having carefully examined the arguments, I'm wondering why these people are still outsourcing their banking.

What could be more mission critical to the commercial lifeblood of a business than money? And yet enterprises the world over are entrusting this vital aspect of their operations to money hosting providers — otherwise known as banks — despite a track record of repeated fraud, deception and failure running throughout the history of the banking industry.

Why would anyone want to give up control of such a vital resource to outsiders? The technology to securely and safely store, transport, lend and hedge money is perfectly well understood. Compared to the equivalent bank charges a typical enterprise has to pay out over the course of a year, you can easily show that, with prudent purchasing and the right staff, you'd save money by doing it yourself. Surely it's a no-brainer?