To govern, big parties need to work with the center, not the extremes

It poses risks to the country that the leadership and top officials of main opposition SYRIZA leave open - even if indirectly - the possibility of cooperation with the leader of the MeRA25 party and former SYRIZA finance minister Yanis Varoufakis.

SYRIZA is not a small protest party. It is the country's second largest political force and could potentially be the next government. What it says and - even more so - what it does or will do will have an impact.

The short-term goal of some may be to ascend to power, but ultimately what matters is to govern the country effectively.

Any participation by Varoufakis in a future coalition government, even if he cannot impose his policies, will not allow such an effective governance. This is the only common sense conclusion, and the markets seem to agree.

In the same way, it is absurd for some in the main opposition...