Going back to the first part of your question, it's not for us to opine upon policy or instrument choice. That said, when you're actually looking at assets that potentially have a lifespan of between 10 and 40 years, that certainty with respect to a funding source is just a basic question. If you're an accountant, when you're looking at capital budgeting and you're actually drawing up a capital budget around your assets, you want to have a forecast of the cash flows coming in over the same period of time as the assets that you're actually managing.
On April 16th, 2018. See this statement in context.