> Depends on if you have a regulated or open electricity market. You describe a regulated market. what's being described is a regulated natural monopoly, stand

> Depends on if you have a regulated or open electricity market. You describe a regulated market. what's being described is a regulated natural monopoly, standard economics. No economist would recommend unregulated natural monopolies. marginal pricing would not pay for a transmission grid, and utility investors would not agree to build or maintain a grid without it being paid for. Marginal pricing refers to the cost of electricity given the grid, where there is no extra amount covering the cost of extra grid capacity.