It's not. It's because the largest banks are all stakeholders in the Automated Clearing House system, they make far higher margins on faster out of band methods (wire transfers), therefore it doesn't behoove them to improve.
There is some progress being made though, slowly and painfully.
There is some progress being made though, slowly and painfully.
http://www.npr.org/sections/money/2013/10/04/229224964/episo...