Aren’t energy prices supposed to pay for that? In France for example, in addition to per kWh rate you also pay a subscription charge corresponding to the maximu

Aren’t energy prices supposed to pay for that? In France for example, in addition to per kWh rate you also pay a subscription charge corresponding to the maximum amount of current you can draw from the grid. The miners who need more power would pay for higher current and thus pay for the upgrades to the grid.