Valentina, i think this would be a good example of why socialism is bound to fail:
one economics professor made a statement that he had never failed a single student before, but had once failed an entire class. class had insisted that socialism worked and that no one would be poor and no one would be rich.
professor decided to have an experiment.
all grades would be averaged and everyone would receive the same grade so no one would fail and no one would receive an A.
after the first test, the grades were averaged and everyone got B. the students who studied hard were upset and the students who studied little were happy. after econd test students who studied little had studied even less and the ones who studied hard decided they wanted a free ride too so they studied little.
second test average was a D! nobody was happy.
after 3rd test the average was an F.