That has been my great fear of expanding GO as it opens the door to urban sprawl in places that have no policy in place to deal with it in the first place. Going to Hamilton, London or any large city of 300,000+ is one thing, but going to X with 10-50,000 is unwelcome urban sprawl and traffic issues.
A lot of famers have sold land as there is no family member to carry on the farm, the return is too low and so on.
The green belt was setup to stop urban sprawl, so other land must be protected for framing, otherwise where will the food from it come from down the road?? Once you open the door to lost framing and food, you are setting yourself up to pay higher food cost to have X country to produce it as well having a gun pointed with huge demands. You can never recover that lost farm land down the road as the soil does call the shot doing so.