A ditch digger can work an hour of overtime for extra pay, and a piece worker earns more the more he or she produces.

一个挖沟的工人加班一小时可以拿到更多钱，计件工完成的件数越多，赚得越多。

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Henry Ford's moving assembly line turned the automobile--once a toy for the rich--into an essential piece of equipment that any worker could buy.

FORBES: Who Woulda Thunk

Customers could scroll through the options and select what they want, rather than have a customer-service worker jot down their order on a piece of paper and pass that along to another employee who fills it.

WSJ: As Wages Rise, Firms Consider Replacing Workers With Devices

Importantly, he refers later in his piece to outsourcing, which in many cases may be the actual alternative to hiring an H1-B worker.

FORBES: Misunderstanding the Benefits of High-Skilled Immigrants