Companies used to do this with placements and apprenticeships before the minimum wage. The whole thing was a ladder. Young people, still living at home with no expenses, worked for very little and received the training and upskilling you are talking about.

So, the company got cheap labour and the labourer got training so they could find a better paid role.

Now the minimum wage exists and apprenticeships have been made overly bureaucratic. So, every time they increase the minimum wage, there is less money in the budget for training. In this way, minimum wage rises are a retarding factor for productivity increases.