[ocdtrekkie]

No law less than this would work, because Google is too powerful and adept at pressuring any other party it has to deal with to get its way. You can see this when a law similar to what you suggest was passed in Spain and Google shut down just Google News. Or when Germany passed a similar law, without a requirement to participate, and Google just made it clear if publishers didn't give Google a license for free they'd be booted off search.

Google is like the mob, in that you literally have to build a whole new law around dealing with it (RICO) that lets you come at the edge and use that to come at the head of the snake.