This gets to the fundamental problem. I can see where the court is going, and as a civil libertarian myself, I have a lot of sympathy for that idea.
The trouble is I don't know how we avoid getting to where we are south of the border, once we say we're removing restrictions on third parties spending as much as they want, and I also don't see how we avoid certain things. I'm not sure we'd want to avoid this; I merely throw this out as things it would be hard to avoid, things like money being used for demotivation of certain groups of voters or demonization of candidates. I'm not talking about making things up, saying that so-and-so is an axe murderer or a pedophile. I'm talking about discouraging people by saying that Doug Ford is the scariest human being they've ever seen; my goodness, they can't let him be Premier of Ontario or take his name out and drop in Andrea Horwath's and say the same thing. I don't see how you avoid that.
Is there a way out of that conundrum, or in the end are we forced to choose between Scylla on the one side and Charybdis on the other? I throw that back to you for comment.