Capitalism vs. Communism

An economics professor at a university said he has never made a student fail, but once failed an entire class.
Because the students in this class are adamant that a perfectly organized society is a society where no one is rich, no one is poor, and that it is a utopia, he wanted to show them there is no such society like that.
So the professor said:
"Okay, then our class will experiment on that. All the points will be added and divided equally, and everyone will get the same score so that no one will fail and no one will get an A*."
After the first test, the average grade for the whole class was B. The diligent students were sad, and the lazy students were happy.
On the second test, the grade point average for the whole class was D! No one was happy. Since the lazy students were even more inert, the hardworking students decided they should study less too. On the third test, the average score was F. The score did not increase, but quarrels, suspicions, and accusations broke out. Everyone is upset and angry, and everyone no longer wants to learn for the benefit of others.
In the last exam, all of them failed, making everyone surprised...
The professor told them that:
-"Through the results of the tests, you can easily see that the kind of social justice you want is challenging to come true. Although the idea is beautiful, when put into practice, no one is motivated to want to work anymore."
Finally, he concluded:
You can't make the poor rich by making the rich poor.
Those who do nothing but still enjoy it, while those who have to do it do not get the reward worth the effort.
What the government gives someone for free, it must be taken from someone else.
When half of humanity sees that they don't need to do anything because someone else will do it, and the other half thinks that it won't do them any good to exhaust their bodies because others will take them over. That is the beginning of the end of all societies!