During the Depression, he worked for the Civilian Conservation Corps (CCC), which provided manual labor jobs related to the conservation and development of natural resources in government-owned rural lands.
The economy makes new machines that replace manual labor because many thousands of people are paid very well to do so.
She knew the manual labor class worked with their hands, but she didn't realize they used them to do more than serve the elite.
My grandfather was from the elite and my grandmother from the manual labor class.
The principal causes are the growth of population, and the over-supply of and low rates of remuneration for manual labor in various Italian provinces.
I am not saying if you enjoy manual labor and being exhausted at the end of the day, you shouldn't do it.