Businesses, according to California law, with one or more employees must provide Workers Compensation benefits to their workers. Workers Compensation insurance serves two purposes: It ensures that workers who are injured or become ill on the job get medical care and compensation for a portion of the income they lose while they are unable to return to work, and it usually protects employers from lawsuits by workers injured while working. If a worker is killed on the job, death benefits to his or her dependents will also be provided.