>Less people buying power from the utilities means they increase prices on the remaining customers.

Demand on the grid is going up.

What's driving up the cost is that all those rebates and 0% loans for solar, heat pumps, etc, etc, tax advantages for qualifying installers, etc, etc, etc, all that stuff is paid for by loading it into the transmission and distribution charges, the "cost of the wires and pipes" on your bill.