How do commercial banks manage finance?

[Good-Person]

Commercial banks are the kind of banks that involve in many different commercial activities. Commercial banks are quite popular in our country. They offer services related to investments, financial securities, money management, etc. So, how do they manage finances?

 

[Kane]

I have never worked in a a bank, so I do not know how do they do it. However, I have friends and family working in commercial banks and they tell me that the banks collect money as deposits from general people and lend the money to rich people so that rich people can make more money at the expense of poor people.