I don’t know who you’ve been asking about the euro and Schengen, Karl.
The single currency has been an absolute disaster for the peripheral states. It has led to near national bankruptcy in Greece (only avoided by the imposition of strict budgetary control from Brussels/Strasbourg). It has led to mass unemployment in Italy, Spain, Greece with young people particularly hard hit. Although the figures have improved recently, overall unemployment in those nations still stands at 11%, 14% and 18% respectively. The youth unemployment figures are far worse at 34%, 39% and 44%. As recently as 2015 over half of those under 25 in Greece were without a job. This is a direct result of those countries suffering “internal deflation”. Being unable to promote trade by means of currency fluctuations they are locked into a currency which was designed primarily for Germany. They were allowed to borrow huge sums in a currency they could not afford and the result is plain to see. There were ample warnings prior to its introduction that the euro was a “fair weather” project which would be fine so long as there were no problems but flawed to a such degree that it would not cope with less than ideal conditions. Well, unsurprisingly, there have been problems leaving the people of those nations to pick up the pieces (which is all they are able to afford). As well as this Italy is on the brink of a full blown default which will make a No Deal Brexit seem like a Teddy Bears’ Picnic. Meanwhile Germany continues to run an annual 8% current account surplus (much of it sucked from the peripheral states) which it has done for years, despite the Lisbon Treaty dictating that it should not exceed 3%.
Schengen is another fair weather project. It allows free movement to those entitled to be within its bounds. But it also affords the same privilege to those not so entitled. So we see Frau Merkel inviting all and sundry to Germany and lo and behold they have not all remained there. Ask the people of Malmo in Sweden how they feel about the Schengen Agreement. Their city has a population of around 350,000. More than 135,000 of those are of foreign extraction and over 95,000 of them were born outside the EU. I would hazard a guess that a sizeable number of them arrived elsewhere in Europe and took advantage of Schengen.