Earlier quoted context omitted.
Specifically Congress. The President doesn’t have the right to create taxes which is one key difference here. The argument is whether Congress abdicated their power here and whether that’s something they can do in the first place.
> The argument is whether Congress abdicated their power here and whether that’s something they can do in the first place. It would seem that as elected representatives of the people (we are literally their boss), they can't do that without asking us first. The whole point of them existing is to give us power and limit the executive's power, not the opposite.
Because Article One vests "all legislative powers" to Congress, they cannot delegate legislative powers to the Executive and Judicial branches (because then not all legislative powers would be vested with Congress).