Without the worker, the company would be making a profit of n€. With them, it makes a profit of n+m€. So it gains m€ of value from hiring them. If they paid tha

Without the worker, the company would be making a profit of n€. With them, it makes a profit of n+m€. So it gains m€ of value from hiring them. If they paid that money as their salary, hiring them would have been pointless.