The better remuneration and conditions the workers have, the more expensive they are, and the more there's an incentive to invest into capital replacing labor so that you have more machines and fewer workers.

There are many things that could be automated right now (for example, in the garments industry) but are not because it's currently cheaper to do them in a third world country by poorly paid workers - but the moment those workers would have to be properly paid, the tasks would go away as then it would be cheaper to automate.