The reason why wages are currently about stagnant is because employees who work low wage jobs don´t consider finding better jobs that require only a high school diploma.
Goes against this:
They would pay more to prevent their employees from leaving the company.
Right now, many employees get paid less than a good wage. However, that can change if they find better jobs that only require a highschool degree. If employees did this in masses, then the employers would have to pay the employees more just to keep them working and to prevent them from leaving the company.
Meaning people should quit their job and get an education instead of threatening to quit only to get paid more.
They should quit their current job and get a better one that only requires a high school diploma to work.
False. A janitor is worth less so whatever education they get doesn't improve their pay instead would require them to find a better job. Meaning the janitor job will be vacant along with other low-skilled work.
The janitor job can be automated so places stay clean. The robots for it already exist, my grandmother has one and businesses can buy robots to automate the janitor. Meanwhile, the janitor would then have to find a better job that pays better, which would benefit hi due to his increased salary.