(把下面这段文字翻译成汉语) A third disadvantage concerns income security. Self- employed people have no guaranteed wage. Their earnings can vary greatly, depending on business conditions. Salaried people, however, can generally count on continued earnings. In addition, salaried people often enjoy fringe benefits that mean greater peace of mind. One of these benefits may be insurance paid for by the employer that continues the employee’s salary in the event of sickness or accident while many self-employed people do not have such protection.