I think you're putting the miners on the wrong side of the balance sheet there. The point of the plan is for miners to come in and build their own power plants

I think you're putting the miners on the wrong side of the balance sheet there. The point of the plan is for miners to come in and build their own power plants that usually support only the mining operation. Then in times of need, the miners are compelled to sell the energy being generated to the grid. But the variable/flat pricing structure is on the consumer side. Since the mining operations will be on both the supplier and consumer sides for energy that they produce, they aren't subject to flat/variable pricing.