I think to truly be "rich" you shouldn't need to rely on "income" form a 'job' at all
To be, to be "rich' means to be financially secure and established to a point where even if you didn't work another day in your life, you could still maintain a similar lifestyle.
This can really only be achieved through residual income, be it from real estate, dividends, businesses, etc.
Or you just won the lottery
This is just my personal opinion, doesn't have to fit your opinion/idea