Why villains are so evil?!

Ever asked yourself the reason why villains from cartoons are so evil? Specially cartoons for kids.

What are the reasons behind it?

I have a hypothesis. In most of the cartoons the good side seems to have many benefits in relation to the evil side. For example, it is clear that McDuck , Mickey and his friends does not have much problems with money and status. That is, there is an unequal society there which may be the first reason.

A second point is that although the society is uneven, never the evil side can actually win a bit to balance things around. As a result, the evil side becomes more and more evil. While the good side tries to use morality (showing their actions as inherently good and therefore correct), politics (never showing or demonstrating the existing unbalanced society) and fake ingenuity (I am sure you noticed that Mickey always pretend ingenuity to avoid talking seriously about many subjects) to keep the social status unchanged.

In fact, up to some point the good side itself created the evil side.