How would you actually go about that though? It would seem that a major change would have to be made to freedom of speech laws if you want to ban: "According to the NYT..[snip rewording of NYT article different enough to avoid copyright problems]..."
But I agree that this is the issue - I don't think you can found a paywall system on opinion pieces, since they aren't the problem the newspapers have as I understand it. Their problem is that they spend a lot of money having real journalists out their finding real stories, and the revenue stream supporting them has come crashing down.
I hope they can figure out something that works to be honest, or in ten years time all we are going to find anywhere is a thousand rewordings of the same corporate or government press release. And opinion pieces.