

No, LCOE is an aggregated sum of all the cash flows, with the proper discount rates applied based on when that cash flow happens, complete with the cost of borrowing (that is, interest) and the changes in prices (that is, inflation). The rates charged to the ratepayers (approved by state PUCs) are going to go up over time, with inflation, but the effect of that on the overall economics will also be blunted by the time value of money and the interest paid on the up-front costs in the meantime.
When you have to pay up front for the construction of a power plant, you have to pay interest on those borrowed funds for the entire life cycle, so that steadily increasing prices over time is part of the overall cost modeling.
I don’t think it’s an insurmountable challenge. Just that the ratio is what matters, which means abrupt changes to birth rates might be more problematic than the magnitude of the change over time.
But I also don’t think that a stable population size solves the climate crisis or resource depletion. It might be the case that 8 billion people in 2075 end up consuming way more energy and natural resources in an even less sustainable way than the 8 billion people of 2025.