Yes and you cannot depend only on single source of income to get rich in future, you need to find multiple ways of earning it which can increase your financial wealth over a period of time.
That is right suggestion, we can see that a lot of people after getting a job start to live with it alone and try to save their whole life which do not bring any happiness for them while those who do not rely on only that one mean and try to do over time and try to invest their income get wealth very soon in the early stage of their life.
If you will depend only on your salary then you will never become rich with it as you also need to take care of your family and at the end of the day you will be left with nothing if you have only single source of earning.