But those were basically the days of EEC. Then came EU with its dogmatic liberalisation and the inclusion of all Eastern Europe countries. The combination of these factors broke the balance between the European countries, creating competition between these countries that cannot compete fairly, for the level difference is too huge and the Eastern Countries only advantage is engaging a race to the bottom. Salaries can be more then 5 times lower in East than in West! and they even wanted at some point Ukraine to join without any preparation, Ukraine which has 10 to 12 times lower salaries!! They have removed all barriers and regulations that could soften transitions and imbalances. Meanwhile, countries are stuck with Euro and cannot opt for different economic models to adapt to this internal unfair competition. And transfers do not work any more, because it is not in the interest of Eastern countries to reach the level of Western ones, because they would lose their only advantage. This even annihilates the past benefits of EEC time transfers, disrupting the Southern countries.
Wages are lower, yes, but so is the cost of goods and services. Now that they have functioning service economies, wage inflation is happening, in lockstep with price inflation. Parity happens quickly once you get the basics (infrastructure etc.) in place, which has been much of where investment has sat over the last decades.
Investment is the key word here - it's a rash investor who wants his return on a venture before it reaches fruition.
Also - would you rather they were getting cozy with Russia?
But you would have to have a working culture that is similar, which is not the case in the EU. People in Spain don't work like people in France or Germany, their government are different and wanting to have a single fiscal policy is doomed to fail.
Also, the 1 to 5 salary for entry level workers is killing entry level workers in Western Europe, and that's one of the reasons behind so much euroskepticism
Again, it's a question of looking at the bigger picture rather than the immediate situation.
That said, many are voting with their feet - those reviled eastern states are havens for mobile youth, particularly those versed in technology.
I also don't think 30 years is the timescale. It's more like ten, given the already accelerating pace of growth in previously impoverished states. Do look at gdp per cap graphs for, say, Latvia. It's impressive. The financial crash hurt, but they're already back on a healthy sigmoid upramp.
https://www.google.co.uk/search?q=latvia+gdp+per+capita&rlz=...
In my low-middle class family there has been noticeable cases of factories or offices moving to Eastern Europe (Poland notably), and it is fueling extreme right wing parties, for good reasons.
You can talk about "mobile youth", but learning French when you're a low class Czech person is not something that's easy: the mobility in the EU is very restricted for that reason.
http://www.reuters.com/article/us-poland-airports-specialrep...
I can believe the EU is slightly more competent than, say, Greece. I can believe it's not exactly corrupt. But that doesn't mean it's progress.
A few potentially interesting links after a quick googling:
https://www.theguardian.com/world/2015/oct/02/german-reunifi...
http://fortune.com/2014/11/09/germany-east-west-economy/
http://www.economist.com/blogs/graphicdetail/2015/10/daily-c...
And for Italy:
http://www.citymetric.com/business/italys-north-south-divide...
Part of the purpose of the EU and its instruments, such as the euro, is normalisation of European economies into a single framework, with the ultimate goal of parity, which would not only bring about a more efficient and frictionless market (I.e. Simple cross-border trade for services and products), but also ultimately elevate the standard of living for all citizens.
This is why some states which are less developed are currently net beneficiaries of European funds, and others are net donors. Currently. Wealthier nations beget wealth in their neighbours.
To look at monetary policy in a vacuum is a mistake, as it ignores the substantial eu development funds which Italy and Spain are beneficiaries of.
If you look at things in the short term, then poor Britain is being ripped off, the Spaniards are starving, the Greeks are broke - but if you take a longer term view, you'll take into consideration that all normalisation processes inevitably have over and undershoots, which can result in an imperfect present - but only define the future if you choose to let them do so.