However, over the last 30 years, the share of wages in national income has been falling, owing to what MIT professors Erik Brynjolfsson and Andrew McAfee call the “second machine age.” Computerized technology has penetrated deeply into the service sector, taking over jobs for which the human factor and “cognitive functions” were hitherto deemed indispensable.
尽管如此，在过去30年中，工资占国民收入比重在下降，MIT教授埃里克·布莱恩约尔弗森（Erik Brynjolfsson）和安德鲁·麦克菲（Andrew McAfee）认为原因在于“第二机器时代”。计算机化科技深深地渗透到了服务部门，正在霸占迄今人力因素和“认知功能”仍不可或缺的工作岗位。