When we talk about financial success, we can also call it financial freedom. That means getting to a level whereby you are financially independent, you can spend money on your wants and needs without borrowing from others and still have excess to save and give to others.
So, you can see that financial success for people is measured at different level.
For someone who has a company with 200 staff and someone who has a company with 20 staff, their financial success level will be different.
Everyone has a level they attain financially and they can say they are financially independent or successful.