So as soon as Germany lights up their gas powerplants, that follow gas prices (wars, etc), French nuclear electricity has to be sold for the same price.
aren't all/most electricity market working this way (pricing based on marginal price, aka pay-as-clear)?
pay-as-bid has other potential issues and might not be better.
The fundamental issue with electricity markets is that they cannot rely on any signal other than the electricity price to control whether a given plant will be running at a given time or not.
I think a real alternative would be to set-up an entity charged with negotiating prices with the electricity producers (which would also be a sort of partial reversal on the whole market thing in a lot of countries).
Are you talking about the marginal cost? Don't blame the govt, blame the economics textbook.