This is the first I've heard of it, so I'm not going to pretend this is a well-thought-out and researched answer. I can certainly see the potential for that to affect our communities. I'm from Manitoba, so I'm less familiar with Ontario policies, and I defer to anyone else who is. Everyone else is shaking their heads.
I think it relates back to the previous issue about funding parity and the ability to offer competitive packages. I'm not sure how your rural index is calculated, but based on community size, many small, distributed communities often can't support a full-time physician anyway. Anything that makes it harder or more challenging, and where they may be more likely to pick a place where they are eligible for that bonus, could be a step backwards. I can see how that could potentially be harmful.