The things is, most wrongdoers don't get in trouble. The large majority of employment in the United States is at-will. This means that the employer can turn down or terminate any prospective or current employee for whatever reasons they want. They don't even have to give a reason; however, whenever an employer wants to terminate an employee via discrimination, they still usually wait for the first excuse to have cause to terminate, as a way to cover their behinds. The employee can also quit for whatever reason, and also does not have to give a reason. Employee handbooks that deal with discipline, which are usually held to be binding contracts, employment contracts, and union contracts between a labor union and the employer are the most common exceptions to the at-will rule. This makes it almost impossible to prove discrimination, even when it exists.