Workers' comp insurance is typically associated historically with labor or professional unions, and is often the result of coordinated campaigns to obtain the coverage for the union members. Proponents of workers' comp cite improved working conditions, economic support for employees, and the safety net provided by the insurance, as key benefits of workers' comp. Critics of this type of insurance cite increased costs to employers and potential infringement on workers' rights to seek recompense on their own. Another concern that is frequently raised is the possibility of American companies moving parts of their operations or even their entire companies to areas with looser workers' comp law. In the United States, however, workers' comp laws are nearly universal, and almost all employers must carry the insurance in some form for their employees.
The body of laws governing workers' comp insurance has become extremely complex and varies from state to state. For example, in many states it is illegal to terminate an employee for filing a claim or for reporting an injury incurred at the workplace. This isn't illegal in all states, however. And while most states don't allow employers to deny employment based on previous workers' comp claims, employers are able to check a commercially maintained database of claims, a system that could potentially be abused by unethical employers.
Because abuse of the system has occurred on the part of employees as well, stiff fines and other legal penalties are in place for persons who file false claims for workers' compensation benefits. While stories of supposedly injured employees engaging in physically demanding activities are commonplace, little hard data exists to indicate what percentage, if any, of the claims filed every year are actually fraudulent. Vigorous investigation by employers, including tactics such as secretly video taping claimants engaged in physical activity, have also undoubtedly helped reduce the number of false claims. Certainly the vast majority of claims filed are the result of legitimate, unavoidable work-place injuries.

