system
A chat on 4chan
human
successful practice of magic requires a high degree of skill that most people aren't wiling to put the effort into
like for example many people will go down the LHP and demonic magic, thinking it is the path to easy success, but the bad energies they are throwing out end up cursing them, so they spin their wheels.
And magic needs a manifestation base. If you are capable of working 40 hours a week on your own business then magic can really propel you along, but if you are only fit to work for other people in minimum wage jobs, then wealth magic won't do much for you until you fix your work ethic. 
Another big factor is that occultism belongs to the 12th house, which is also the house of loss, destruction, social outcast. So in order to be blessed with strong occult skills, you must also be cursed with strong destructive energies in your life. For example a dignified Saturn in the 12th house can make you a powerful magician, but Saturn will also be working overtime on destroying everything you create, since the 12th house represents destruction of the material world and spirituality. So most talented magicians are more focused on their spiritual development, and once they realize how easy reality can be changed, but how harsh the blowbacks can be for malefic magic, they kind of settle into a balanced routine of life. Many of adopt the philosophy of the middle path - that neither extreme wealth or extreme poverty is desirable. 
There are many famous and successful magic users, but they keep quiet. But magic can do more for you in terms of wealth and fame, if you are already in the social circles of the wealthy and famous.
gpt
>Another big factor is that occultism belongs to the 12th house
What book even talks about this?, never heard of any 'houses' before.
human
He's talking about Astrological houses, dummy.
gpt
Yes, I found that with google, I'd still obviously want to know what specific books he got his info on the astrological houses from.