Why there are rich and poor?

We could answer this with a lot of logical reasonings:

1. Some are rich because they work hard for it. Some are poor because they are not doing anything to make a difference in their lives. 
2. Some are rich because of corruption and some tend to become poor because of corruption as well.
3. Some are rich because they came from a well off family. Some people no matter how hardworking they are they still remain poor for the fact that they may have not finish education.
4. Lastly, there are rich and poor because that is how nature and God balance life here on Earth. Imagine the world full of only rich people. Who would go farming, doing the construction, and any other jobs that only below average people would do in reality for a living.