[danielnaab]

Besides being a bad metric (solar installations have fixed up-front costs, with long lifespans)...

High labor costs per unit of energy is a good thing. Coal mining is resource intensive, and a significant portion of your energy dollar is going into paying for the cost of mining and transport. If a kWh of solar costs the same as a kWh of coal, all things equal, it is better for society for that cost to be spread among many well paid, middle class laborers.

[dredmorbius]

All else being equal, you do want to minimize your input costs, labor, capital, raw materials, and otherwise, in whatever activities you're engaged in.

The fact that fossil fuels allow for a huge avoided cost (that of the prehistoric accumulation of sunlight and transformation into fuels) doesn't make low labor costs inherently bad.

I'm wrapping my head around various bits of the labor / wage equity question, but on balance I suspect it's largely independent of cost inputs to basic resources, including energy, which would mean that you're confounding two unrelated issues.

The goal should be to have sufficient accessible well-paying jobs. Not for them to necessarily be in low-productivity, but nonetheless essential, energy harvesting positions.

Though that may turn out to be the case.