> If the U.K. wants to diverge the its regulatory regime then there must be customs checks where they differ, otherwise smuggling will thrive
Sounds like there are three options (I'm going to talk as if from the UK point of view):
- (1) Same customs laws + No custom checks = My sovereignty is getting violated because I can't change my laws without your permission
- (2) Different customs laws + Customs checks = We both have sovereignty and our regulations are enforced, but violent people who hate the border will attack it and kill people; that seems bad.
- (3) Different customs laws + No border = I make my own laws, and I choose to find violators at weigh stations, when pulling over people for traffic offenses, or by inspectors at the final destination (British equivalent of USDA?) I don't care enough about enforcement to check everyone, so I'm not going to make a physical border checkpoint. If you care so much about checking everyone, you're free to make a checkpoint on your own side. Your people will be the ones who do the dying when the violent border haters attack, but that's your problem. We both know border checkpoints here will cost lives, I don't think it's worth it, you do, I do what I think is right on my side, you do what you think is right on your side. That's what being different countries means, we can make different choices when different policy options involve trade-offs.
Option (3) seems pretty reasonable to me.