I knew it because i am a employee of course.
Ofcourse. But many would find it hard to manage both their personal businesses and jobs at the same time . What they do could do in this case is to find honest & skilled people to manage the businesses for them while they focus more on their jobs. I know of a gentleman on youtube who is probably contracted by lots people to set up farms and manage them for his clients. That is kind of people the job people could contract to manage their businesses for them so that they could focus their attention on their jobs.
I prefer to be self employed by the way