The real culprits on this matter are the nukes in OPG.
They just about did Ontario in once before, and although not fully paid for yet, the balance of the legacy costs are still on the books.
Not content with this, the Province is doubling down on even more nukes with huge costs ($ 10's of billions) and they are already applying for associated energy price increases  up to 3 fold to pay for this.

If this isn't reversed, mark my words, the impact will make all other increases pale by comparison.