Many services cannot readily be mechanized or imported – old people cannot be cared for by a robot or from abroad – while people increasingly pay others to perform tasks that they once did themselves, freeing up their own time for more productive work or leisure. Thus, as advanced economies create high-skilled jobs, they inevitably create low-skilled ones, too.
许多服务是无法机械化或者进口的。我们无法用机器人或者从外国照顾老年人。人们越来越多地花钱让别人做以前他们自己做的工作，从而释放了他们自己的时间来从事更为创造性的工作或者休闲。这样，在先进的经济体创造高技能工作的时候，它们不可避免地也在创造低技能的工作机会。