Prices always go up with a change in currency, I remember when we changed from £sd, prices soared immediately.
The same happened all over Europe with the euro.
France and Germany contribute most which is maybe why they appear more powerful, but all have their vote, however much or little they pay.
It’s my understanding that tax avoidance in Greece was commonplace, not everyone of course but too many. Borrowing and high living was rife and a country can’t carry on like that forever.
Germans don’t generally borrow or go into personal debt (credit cards not accepted in most places and just try finding an ATM even in the biggest city) yet were paying the lions share of further loans to Greece. It was a hard sell for Merkel and it was only when Greece were told to leave if they didn’t like the conditions for further loans that they changed their minds as they wanted to stay in the EU.
I found the programme fascinating.