Worker motivation to take advantage of new technology is extremely important. The more you pay for workers to learn a given skill, the more likely they are to learn it. No amount of extremely efficient technology can help if your employees are incompetent at using it.
> Worker motivation to take advantage of new technology is extremely important
They're motivated by not being able to get a job if they don't know how to do the job. There's an equilibrium state where workers and employers are both investing some amount into training.