No, they're thinking "How much money can we rescue tomorrow."
And that's all they're thinking.
Piketty is right - it's atrategic idiocy of the first order.
As for tax avoidance - some countries, including the UK, have based significant sectors of their economy on tax avoidance.
In the same way that it's immensely hypocritical of Germany to lecture Greece on debt, it's equally hypocritical of the Eurozone to lecture Greece on tax avoidance, when the bankers and corporates know damn well that if they weren't avoiding taxation at least as aggressively, austerity would be completely unnecessary.
But of course they mean tax avoidance by working class people, which is a very bad thing, and not tax avoidance by corporations, banks, and oligarchs, which is a very good thing.
It's this kind of twisted self-serving nonsense that has created the situation in Greece. Sovereign debt is a symptom of much deeper problems, not a final cause.