If employers are free to pay less than minimum wage, they can spread the amount they allocate to wages over more people. This decreases unemployment.
This is the same as any managerial decision on costs. Costs depend on negotiated agreement between all parties involved - if your total costs exceed your total revenues, you make a loss and unless you turn it around before you go bankrupt, you will go out of business.
For example, if a raw material is no longer available for as little as it was before, and costs rise too much compared to revenues, you can and should go out of business.
Likewise, if workers are only willing to accept more for their labour and wage costs rise too much for the employer relative to his revenues, he can and should go out of business.
Companies provide a voice for the employer to drive down costs to run his business more profitably, when the employer would not be able to run his business as well or drive down costs as much on his own.
Trade union and State action provides a voice for workers who are no longer willing to accept wages and working conditions being as deficient as they are, when workers would not be able to bargain for more acceptable wages and conditions on their own.
With a certain amount of company power and worker power, a balance is reached that allows the economy to run more stably.
ANOTHER way to decrease unemployment than decreasing wages is to decrease profits.
The same allocation of business outgoings can be spread more in favour of employees than employers.
This, instead of decreasing worker employment will decrease the number of businesses and their growth.
Employers will face “unemployerment” instead of employees facing unemploy(ee)ment.
If both demand for employer and employee takings is too high, they each devalue each other if inflationary action is taken to give the illusion of each getting their wish, but the balance is the same - only in accordance with the balance of power between employer and employee.
The degree of unemploy(er)ment/unemploy(ee)ment that is chosen is down to politics - what do you want out of your society and at what cost?
Do we face too many social problems from lack of production and service provision or too many social problems from worker poverty and lack of quality of life?
At the moment, the answer is clear.
The reason that we have such an abundance of business at the expense of workers is because the balance of power is in favour of business over workers.
Employers are generally the type that prefer power and responsibility, and employees are generally the type that prefer their life to be simpler.
The less power to the state and trade unions, the more power to employers - the balance is tipped too much in favour of the richer.
The more power to the state and trade unions, the less power to employers - the balance is tipped too much in favour of the poorer.
Either version of imbalance is tyrannical and/or not optimal for quality of life in work AND consumption of the products of work.