A toxic work environment at the FDIC, one of the nation’s top banking regulators, has for years caused employees to flee from an agency they say enabled and failed to punish bad behavior, according to a Wall Street Journal investigation.

A toxic work environment at the FDIC, one of the nation’s top banking regulators, has for years caused employees to flee from an agency they say enabled and failed to punish bad behavior, according to a Wall Street Journal investigation.