Telika: Do you think that this point (the what-exactly-leads-to-such-decisions) is a secondary question, or do you think it is a central issue about the EU ?
In the end many things are central.
Balanced budgets, discipline, no more additional debt - that are essential points for the future of the EU and my impression is that most if not all member countries fully agree with this. But this needs to be flanked by anticyclical policy, meaning stimulus in times of crisis financed by even more (yes more) austerity in boom phases. You do not need an everincreasing public debt pile to grow.
The other part is inhomogeneity. Some regions do better than others. You need a balance of solidarity and competition.
The third part is a political democratic union.
The fourth is probably banking regulations.
If you solve all these central issues you get a nicely harmonizing, prospering EU. But maybe solving and agreeing on a solution is just too difficult. I don't think that a working EU is impossible, just that making it might be too painful.
Greece is indeed showing bad influences of all these points but Greece is also exceptional in that it's problems are so much more severe than those of others and they failed themselves on so many points (for example the IMF reported that only 1 out of 12 proposed (in 2012) closed job sectors could be opened effectively).
Greek is kept half-dead/half-alive. I don't understand it and frankly I don't want anymore. I give up.
As a pragmatical way out: If I would live in a comparable country, I would emigrate (to Canada or whereever).