And most often high costs mean higher ROI. The wind farm doesn't get continued funding precisely because it produces electricity when supply is high and hence prices are low. Electricity is not worth the same at all times; you can sell your coal fired watts when the wind speeds are low and the unit price jumps up. Instead of trying to solve the hard problem of storing electricity to fill the intermittency gap, capitalism takes the easy way out of burning fossil fuels unless you force it not to by regulating.