Luckily nothing stops Congress from making laws that clarify what they granted the EPA. If they were so fussed with the EPA doing what they were doing, why didn't they leap up and pass a law that told them to stop?
Why is it the court's job to tell congress what they meant to say? Is congress mute?
> Why is it the court's job to tell congress what they meant to say?
That's... not what they're doing. The court is telling Congress that if you want an agency to have the power to make vast, sweeping changes, then you have to be explicit. They don't get to create an agency and then just give them blanket authority to do anything they want, at any scale.
Congress is not mute. Congress speaks by passing laws. Any other, less formal means of speaking is the voice of members of Congress, not Congress as a whole.
The supreme court has no enforcement mechanism. It has no army, no police. Abiding by Supreme Court rulings is by tradition only.
>Where ambiguity exists, it is the court's job to interpret the law. That's literally the entire purpose of a court.
This is also by tradition only. The Constitution doesn't specify this, nor are there any laws that say this is the job of the court.