All too easily we would become a Europe of internal economic migrants and unwelcome neighbours. The fight not to admit each other would begin long before the complicating accession of eastern European states. Finding any politician who would advocate a general 10p tax rise will be hard enough. Finding one who would do so to spend the money elsewhere will be impossible. Only capital has an unrestricted right to flee - towards lowest cost labour and tax havens in space or cyberspace.
All business is exposed to the vagaries of currency speculators.
Secondly, we need agreement on environmental sustainability. Shifting production in pursuit of unrestrained pollution is the most certain route to 21st century catastrophe. Finally, Europe itself needs to break from the monetarist follies enshrined in the Maastricht Treaty. The privatisation agenda Maastricht pushes us into is neither biblical nor sensible. It is simply about corporate greed.