Reduced transportation and shipping costs means lower cost of basically all material goods, including the material cost of building housing. And in that kind of economy, I think overall wages will be higher in terms of actual purchasing power. Not only would almost everything be cheaper, real wages would probably increase due to overall increased demand.

But I agree that health insurance, day care, and college would not get magically fixed by lower energy cost. I believe those costs have risen for other reasons.

Also I am not totally convinced by grandparent's theory that energy cost is what caused the decoupling of wages from productivity. Maybe.