Just imagine allowing foreigners to come set up picket lines outside your company entrance to shut it down.
Imagine surrendering tax policy to some entity in which you only have minority representation.
Any politician who advocates joining the EU under these conditions should be tried for treason.
That's easy to prevent. All "your company" has to do is move it's operations offshore to the foreigner's land...it's being done on what seems to be a daily basis here.