Its very simple the more you work the more you get
Did you mean the more rich your parents are the more you get?
Ask yourself does being a rich means you're working hard as what farmers do? The answer is no, reason people get rich is because they have the ability to buy resources which a hardwork person can't then make this person as a puppet to do the work for them. Getting 10% from employee which do the work while 90% for the boss which doesn't do anything and his only part is the resources/equipement he has for the employer to be able to work.
Sad truth. But really pretty much how everything works. This is the system that is not that easy to breach. The key if you ask me is education. People who worked hard and invest on education gets to have a a more fair shot in life.