What kind of work can be called simple and what is difficult? How is human labor evaluated?

Any work is difficult. Because a person makes efforts, tries, trains willpower (for example, when you already want to rest, but you need to continue to work). There are stereotypes, for example, that mental activity is the easiest type of labor. It’s actually hard to unload sacks of potatoes, but just as hard to write a book. A person makes efforts, overcomes his laziness (no matter what he does).

Labor is assessed by monetary reward: advance payment, wages, bonuses, career advancement.