To me that primarily means keeping their thumbs off the scales. If the powerful don't get to use the state to force everyone else into enriching them, then the natural dynamics will unfold in a way that benefits a wide swath of the population.

The analogy to the industrial revolution would be if people hadn't been forced from land they had legitimate claims to. In that counterfactual, industrialization would have occurred less rapidly and people would have moved to the cities only when it offered them legitimately better opportunities. It's easy to speculate that part of that would be in the form of less horrible working conditions.