My power bill includes a delivery and an energy charge, both measured by kWh.
The delivery charge is intended to pay for the actual electrical lines and maintenance, the point of issue here (providing a connection to the grid).
If the issue is that a net-metered household isn't paying enough for the electrical lines, simply don't net-meter that part of the bill. Charge the full delivery charge per kWh drawn from the grid, without subtracting the amount sold back to the grid.
The delivery charge is intended to pay for the actual electrical lines and maintenance, the point of issue here (providing a connection to the grid).
If the issue is that a net-metered household isn't paying enough for the electrical lines, simply don't net-meter that part of the bill. Charge the full delivery charge per kWh drawn from the grid, without subtracting the amount sold back to the grid.