They want to do some job for money and you're telling them "no, it pays too little, you're not allowed to do that job, you should be on welfare or find another job instead!".
>No, no, they are paid by the owners who decide what slice of the income to allocate to salaries. The customers pay the product and walk away, they don't know anything about the internal workings of a company
The income of the company is connected to the value generated by the workers it employs. An owner of a law firm can pays its employees much better than an owner of a fast food restaurant, because people are willing to pay more for lawyers than they are for fast food service. If the law forced restaurant owners to pay their workers as much as a law firm has to pay its workers, most restaurants would go out of business because people simply aren't willing to pay as much for restaurant service as they are for lawyers.
>The law asks the boss to pay livable salary, the end price has nothing to do with the law. If the service cannot be offered at competitive prices while offering livable wages, it's not a sustainable business
The maximum salary someone can expect is proportional to how much value they can generate for people. If the law requires someone to be paid much more than the maximuim amount of value they can generate given their skills/abilities at the time, then people will simply choose to forgo that service. If you had to pay someone $200/hour to clean your windows, would you do that, or would you clean them yourselves / let them remain uncleaned?
Minimum wage laws don't create jobs; the minimum wage is always zero (if nobody thinks someone can produce enough value to justify paying them the minimum wage, nobody will pay/hire them). Feel free to declare low-paying jobs "unsustainable", but note that the alternative to such jobs in many cases isn't livable wages, it's no wages, or welfare.