Post Brexit vote, everything imported got more expensive because the pound flunked. We are all worse off by a few hundred quid a year now. Expect more of that if car firms, banks etc move into the EU from the UK. Do you care in this instance, or just when it suits a Leave perspective?
The downgrading of our economy is not hypothetical however. We have high levels of inflation now. A hard Brexit would not bring about an upflift in our currency, I'd guess it would see it slip further down making everything imported more expensive still, and holidays abroad much more pricy.
Our economy is also tied to some extremely poor regions in the UK. Parts of Wales etc Being connected to the EU is not just being connected to the (tiny) economy of Greece but also the strength and power of Germany, France etc. and Italy and Spain are large relatively successful economies. Together we are stronger and able to compete with the US, China etc and so what if we bring little places like Greece along with us, if that is what they choose? It's no great strain on us, and actually provides us with more markets for us to sell to and interact with. You want to sell you medical stuff into a hospital in Athens, or buy a little plot of land on a Greek island to relax on - you could both this week if you needed without any beaucratic nonsense holding you up. That has been the success of the EU and has seen the UK become more wealthy since the 70s off the back of this open market potential. Its something us Anglo-Saxons are better setup to exploit. Whether from Thatcherism or an inbuilt way of working, we benifit from open trade more than southern nations it seesm - just look at the data below on how the UK grew and overtook France, Germany in some economic meansure since joining in the 70s.On our own we were the sick man of Europe, and it wasn't all that long ago.
We have freedom to trade with the commonwealth and other nations then. What has changed now?
Different ways to measure wealth accross the EU. I thought these maybe interesting