1. Germany was not obliged to but chose to pay as the biggest benefactor from the EU. If Greece is not prepared to reform her unsustainable pension and taxation policies it will end up leaving the EU. So it comes down to choice. Just as the UK didn't have to help Ireland with approx 10bn of credit but it chose to.
2. Are we talking per capita or absolute GDP size. You do realise US has 350m against 250-300m EU population size and being a single market with 51 Federal states and most advance country in the World should do. I agree with FM your understanding is different to ours.
3. Those charts don't say much other than variances in the countries stats. EU has some of the best living standards, life styles and highest disposable income in the World. Your opinion EU is a bunch of weak countries is a matter for your judgement.
4. Mexico is not the point. There is a shift in tectonic trading plates of the world towards trading blocs and agreements and standards to facilitate trade? US is a big enough market place with 350m people. UK has about 70m. Doesn't have independence on food and many strategic industries. So comparing UK to US is not the same thing.
Moreover, NAFTA is looking at incorporating Latin American countries into those agreements too. Same as Asia incorporating more countries.
5. European Union is far ahead of both these and in some cases is a positive. I would like the option of going to live in Italy, move my pension there and be entitled to free health service as EU members are entitled to the same here in the UK. I see no issue there and feel it is a positive to all EU members. One of my friends has already made the move to Spain last March. He is not alone either.
Another friend also was in IT who married a Bulgarian and moved over to some big fantastic farm over there and does balloon flights for visitors.
I love travelling in Europe too. When one has several small countries with some as little as 5 m populations, the union makes good sense. A little like Federal states in the US.
I know some of the cannabis rules are stupid different between states and it makes a mockery of law and order. So harmonising of those rules and laws makes sense. How can a man be innocent in one state and guilty in another.
6. Reasons why scientists and inventions go to the US is because there are more funds for R&D and a longer view is taken compared to short term ROI in the UK in particular. This is one of the key reasons for the decline of British industry. Starved of invesment and good management. Blamed the unions. We also have considerably less engineers (8x less) than Germany or Japan.
Moreover, some industries as Airlines require massive capital investments which the small countries in the EU could not take on individually but collectively can. Hence, Boeing is challenged by Airbus. UK Rolls Royce is a direct benefactor of this union and World leader in engine manufacture.
In summary considering the challenges and prospects of conducting global business, to focus on free movement of labour and a few hard working immigrants is short sighted and much ado about nothing imo.
When there is big prey to hunt out in the big wide jungle some people simply want to swat mosquitoes.