Re your second question. I assume you mean the inability of Greece to pay its debts and the effect that has had on other Eurozone members? My view is that there's nothing wrong with Greece being a member state of the EU and part of the Single Market, the problems start when money is loan in vast quantities and then the country is admitted to the Eurozone. In that regard I think that it was the right decision for the UK NOT to become part of the Eurozone.
Greece has defaulted on its external debt five times in the modern era (1826, 1843, 1860, 1894 and 1932). In 1985, Greece had the world’s largest per capita public debt. It has an endemic avoidance of tax built into its DNA. However, it is a desirable state to have in the EU because of strategic and cultural reasons alone.
Some Eurocrats and bankers made some bad decisions about lending to Greece and admittance to the Euro but the Greek population has not contributed to immigration problems and there is a huge demand for their tourism and agricultural produce.
Anyone would think the UK has never ****ed up the way some people go on about Greece.