[beaunative]

The way capitalism works is that it ignores borders with some friction. And it is indeed more efficient. To a point where you suspect those borders don't exist, but they do. And that's the problem. Neither you or the OP are wrong. There is just no perfect way of doing it, but what we can decide is that if those damage that those extreme cases could do were worth the cost of upkeeping those industries when there were no such cases. Would people be willing to pay 300% taxes for everything everyday, I'm pretty sure then they would be damning the government for doing that.