Hence a human can do two or three times as much work, but with no extra effort - the robot is doing the heavy lifting, and is simply being directed by the human inside it.

因此，一个人可以做两或三倍的工作，但没有额外的努力-机器人在做繁重，并简单地被导演里面的人。

youdao

Taxes reduce the incentive to work an extra hour rather than go home, or to put in extra effort in the hope of promotion.

ECONOMIST: Why don't rising incomes make everybody happier?