Because the father -- one of the fathers of the Industrial Revolution, Adam Smith -- was convinced that human beings were by their very natures lazy, and wouldn't do anything unless you made it worth their while, and the way you made it worth their while was by incentivizing, by giving them rewards.
Karena salah satu dari bapak Revolusi Industri, Adam Smith -- yakin bahwa pada dasarnya manusia adalah makhluk pemalas, dan tidak akan melakukan apapun kecuali Anda membuat mereka bekerja dan caranya adalah dengan memberi insentif, memberi mereka imbalan.