Let's say you can make $80,000 as a hairdresser. You are seriously proposing that someone who takes all of the risk of
* Renting their own hair salon,
* Building up their own clientele,
* Taking out loans to purchase hair dressing equipment, and
* The thousand other things the business owner has to do in addition to actually dress hair themselves,
should walk away with the same amount we the person who just gets hired to dress hair.
No one would ever start a legal business under such a regime. It's all downside! Which is why you never see people actually owning and running businesses (successful ones at least, and most unsuccessful ones too) with the mindset you describe.