Please let us not use a techie approach to this. Let's read the manual first.
I recommend that everybody read the "Treaty of Lisbon" http://eur-lex.europa.eu/legal-content/EN/TXT/?uri=OJ:C:2007:306:TOC.
I've just started and it is really helping me differentiate between the rhetoric and facts that are being thrown at us by both camps. I still have a long way to go before I can make any definite decision about "To Brexit or not to Brexit", but I tend to lean towards Brexit. This is largely due to my belief that more admin never helped any organization/company/country achieve lasting success.