[belorn]

One can look at Sweden and the green parties strategy for dealing with grid instability. Government are interested in a stable grid so they pay fossil fueled power plants to operate in backup mode. That way the power plant get paid twice, once by the government and then for any power that they manage to sell.

The second part to the plan is to spend a lot of tax money expanding the power lines to nearby country in order to increase the capacity for importing energy from nearby countries coal based power plants.

As a conclusion I agree that the people that build power plants don't care about the system as a whole. The government however do care about stability and mine is perfectly fine with spending tax money on that. Politically, voters are not going to be upset that money is spent on grid stability, even if then ends up in the hands of owners of fossil fueled power plants.