This is s side comment, but banks don't actually pay out the ass to get people to work on COBOL. That's a myth. They actually just pay people (sometimes programmers, sometimes not) to learn COBOL. (And pay them fairly unconpetetive salaries, because COBOL is not really all that useful.)

They do pay a lot of money to the people who program COBOL and maintain their archaic IBM mainframes. But that's mostly because it's basically a giant proprietary stack (hardware-OS-softare).