I think the wealth increase is more easily explained by rebuilding everything we just finished blowing up, exploiting all the technological gains we made while

I think the wealth increase is more easily explained by rebuilding everything we just finished blowing up, exploiting all the technological gains we made while getting better at blowing things up and using the disruption/reset as a means to achieve greater local economic maximums (e.g. historical rent seekers kicked out and things are free to become more efficient and mutually beneficial in the time it takes new ones to establish).