after watching a 임승수's 자본론 lecture

https://www.youtube.com/watch?v=7BvXCDEMZss

From sometime, I wondered why rich person or company earned money more and more while poor person earned less money. Recently, I saw one video lecture whose lecturer name was 임승수. He explained about 자본론. In other words, he introduces 칼막스's famous book 자본론.

In this society, money has more and more power. If we have much and enough money, we can purchase more things compared with previous servant or feudal societies. Previous societies owns persons and exploit them. Current society don't own persons but exploits persons still.

How does this capitalism society exploit persons named laborer. 칼막스's 자본론 has a big meaning as proving that exploitation as calculation for the first time. 

In naive thought, the capitalism has a picture below.

C-M-C

We change commodities through money. In the upper composition, there's no extra profit or additional price when exchanging. But in fact, our society has a picture below.

M-C-M

In other words, for money we purchase some commodities or products and sell them with more expensive price. How can it happen? It's possible because the capitalism class pays less money to laborers than his labor hours. 

Unfortunately, laborers may not know whether they are exploited or they have no option. Since massive production is possible, each person can't counter the capitalism class. 

So, each laborers should know that their labor includes 필요노동 and 잉여노동. 필요노동 is named as 임금노동.