I'm sure that both are factors. However, it was fairly easy to work in different European countries before the EU or the EEC existed, it just needed some paperwork filling out, so I'm inclined to think this is a lesser factor. There was migration for work between western European countries such as UK/Germany/France/Italy for well over a century. It has certainly increased in recent decades, but it's not at all new.
In contrast, the Euro affects entire nations, which can depress weaker economies as a result of it being tied to stronger economies like Germany. This affects every manufacturing and export business, with no way to become more competitive relative to stronger economies within the Euro zone. Wealth will continue to drain out to stronger economies. The currency itself is an insurmountable problem, it's not a level playing field, and there's no way to correct that without reverting to a freely floating national currency or political and monetary union. And the latter is not going to be acceptable to the public any time soon; the Euro zone is more likely to collapse before that ever happens.
I'd also suggest that a lot of the migration out of Italy and Spain is a consequence of the Euro-induced economic collapse, not the primary cause. Though it certainly will have a reinforcing effect. I've met plenty of Italians who migrated to work in the UK and US over the last decade+, and for most it wasn't because migration to the UK or US was a life goal for economic or other reasons, it was because there were simply no opportunities or a future for them at home. They would have liked to stay if they could. Open borders would have made this choice easier, but that's an enabling factor, not the primary driver. The situation for these countries is increasingly desperate; they need to have a future for their own people.
I’ve just moved from the UK to Germany. This was primarily enabled by Google translate and online courses like Duolingo, and by websites making the necessary tasks known and understandable.
The Euro is icing on the cake, not the… I guess the metaphor would imply “the main course”?
rleigh isn't arguing that the Euro makes it easier to migrate, which is what you seem to be getting at.
He's arguing that, essentially, countries like Italy, Spain, Greece etc cannot reform their cultures and without the Euro would effectively be forced to re-calibrate their economies by a sinking exchange rate. That is, they'd be unable to afford foreign exports so they'd buy more domestic products, and that in turn would grow their economy. But in the euro there are no floating exchange rates, and people are very reluctant to pay themselves less, and governments are very reluctant to pay out less in benefits, and the EU/ECB is very willing to finance all of this with money printing and huge bailout "loans" .... so in the end there's no incentive to reform or make it easier to get things done.
Convenience of currency changes when migrating is certainly not the issue at hand.
It's true that differing currencies is basically negligible as far as friction goes. So long as you can exchange your money fairly (and you could and can), it's nothing.
Contrast with, say, Venezuela, where there's a fake exchange rate propped up by the government that the average person cannot get, and you start seeing some actual monetary friction.
In contrast, the Euro affects entire nations, which can depress weaker economies as a result of it being tied to stronger economies like Germany. This affects every manufacturing and export business, with no way to become more competitive relative to stronger economies within the Euro zone. Wealth will continue to drain out to stronger economies. The currency itself is an insurmountable problem, it's not a level playing field, and there's no way to correct that without reverting to a freely floating national currency or political and monetary union. And the latter is not going to be acceptable to the public any time soon; the Euro zone is more likely to collapse before that ever happens.
I'd also suggest that a lot of the migration out of Italy and Spain is a consequence of the Euro-induced economic collapse, not the primary cause. Though it certainly will have a reinforcing effect. I've met plenty of Italians who migrated to work in the UK and US over the last decade+, and for most it wasn't because migration to the UK or US was a life goal for economic or other reasons, it was because there were simply no opportunities or a future for them at home. They would have liked to stay if they could. Open borders would have made this choice easier, but that's an enabling factor, not the primary driver. The situation for these countries is increasingly desperate; they need to have a future for their own people.