Except in the Greece scenario, both Greece and Germany are to blame simultaneously as a whole package and not just Greece alone. The misbehaving minority that got bailed out are the German bankers.
If there were exchange rates between Germany and Greece, the problem would never had a chance to grow big enough to require a bailout.
And that's again follows my point - regular French or Poles or Spaniards have zero influence on the German financial system even if they together would be a majority by the numbers and had a same opinion. While German financial system can mess with them if they wish so.
Basically current EU has huge gaps of accountability in multiple directions and areas, even compared to a typical elected oligarchy of the singular developed country. Multiple EU institutions are not elected at all and neither they are accountable to the citizens across EU.
If there were exchange rates between Germany and Greece, the problem would never had a chance to grow big enough to require a bailout.