Yeah, if things collapse in the west there will be nowhere for them to leave to. No-one in their right mind will let their country fall into the same suicidal border policies once the example of their results is in their face.

Look at all the failed African and middle eastern states, historically their next step once the general affluence collapses has been to become slavers and petty warlords trying to hoard what little is left after they desolate the land with their parasitism. Not to leave.