Re: Why do we need to import anything...
>That is a really good question.
Well, we could ask the experts. Most economists think that our farming industry would not be able to compete with cheaper imports without increasing payments to them from the government.
But, you could argue that they are Remainers, so how about Patrick Minford who is one of the biggest advocates of zero tariffs. He reckons it will destroy the UK farming (and manufacturing) industries but the other industries will eventually do better.
Or maybe Pete North, who was very involved in the Leave campaign. He thinks it will be a disaster, as going to WTO would be. So do Leave.UK.
So, that doesn't actually leave many people that think reducing tariffs for food would be a good idea. Perhaps you have a Nobel prize in economics and could explain how it would work, because the experts seem fairly united in believing it won't.
Even if we did benefit in the short term from reducing the tariffs to zero for cheaper food it is doubtful that would happen over the long-term. Once we are entirely reliant on imports the importers can start increasing the prices. Long-term we are looking at significant food price increases.