Laws are pointless if they aren't used. The US has laws to allow whistleblowing. However they are so vague US prosecutors can easily get around them to prosecute and imprison whistleblowers, and the system itself is so corrupt that the "channels" you would use to actually do it would shut down the process almost immediately to save embarrassment to the government. The laws are just feel good laws and don't work, that's why people go straight to the press.