If you are responsible for the finances of a whole state you have to find agreement with the other 18 elected leaders that try to represent their people as well, preferably before you are unable to pay for your countries loans and it collapses.
The Euro group was already moving in his direction but they have to justify their actions in front of their own people. I am all for some fresh wind but if you go into politics you have to be able to make compromises. You cannot just want something thinking that you are the only intelligent person in the room and step back if you do not get it, especially when the future of your country is at stake.