Don't forget that Greece cooked their books with the help of a multinational accounting firm to hide their real level of debt and prop up their exchange rate in order to enter the Euro.
That is at the base of all their troubles not the Euro per se. Blaming the Euro and wanting to return to the Drachma would resolve nothing for Greece. Well it might help tourism because the value of the Drachma would be peanuts but then the Greek government would simply declare bankruptcy because they would never be able to repay the public debt. Goodness knows what impact that would have on the banking sector. It would probably be worse than the Lehman Brothers crash, and nobody wants that.
I am afraid I still don't understand all this business about the EU not being democratic. As far as I can see the UK has a reasonable proportion of elected and politically appointed representation and the EU generally makes decisions that are in accord with the wishes of the majority of the British population. In fact the UK comes out quite well in this respect. The following item is worth a read:
Are UK citizens losing out in Brussels? Not really